intro.md: fix some typos, errors & dead links, plus some stylistic stuff

	modifié :         doc/book/src/intro.md

1 files changed, 27 insertions, 26 deletions

diff --git a/doc/book/src/intro.md b/doc/book/src/intro.md
index 6062a597..a12b669d 100644
--- a/doc/book/src/intro.md
+++ b/doc/book/src/intro.md
@@ -9,20 +9,20 @@
 Garage is a lightweight geo-distributed data store.
 It comes from the observation that despite numerous object stores
 many people have broken data management policies (backup/replication on a single site or none at all).
-To promote better data management policies, we focused on the following desirable properties:
+To promote better data management policies, we focused on the following **desirable properties**:
 
-  - **Self-contained & lightweight**: works everywhere and integrates well in existing environments to target hyperconverged infrastructures.
+  - **Self-contained & lightweight**: works everywhere and integrates well in existing environments to target [hyperconverged infrastructures](https://en.wikipedia.org/wiki/Hyper-converged_infrastructure).
   - **Highly resilient**: highly resilient to network failures, network latency, disk failures, sysadmin failures.
   - **Simple**: simple to understand, simple to operate, simple to debug.
-  - **Internet enabled**: made for multi-sites (eg. datacenter, offices, etc.) interconnected through a regular internet connection.
+  - **Internet enabled**: made for multi-sites (eg. datacenters, offices, households, etc.) interconnected through regular Internet connections.
 
 We also noted that the pursuit of some other goals are detrimental to our initial goals.
-The following has been identified has non-goals, if these points matter to you, you should not use Garage:
+The following has been identified has **non-goals** (if these points matter to you, you should not use Garage):
 
   - **Extreme performances**: high performances constrain a lot the design and the infrastructure; we seek performances through minimalism only.
   - **Feature extensiveness**: complete implementation of the S3 API or any other API to make garage a drop-in replacement is not targeted as it could lead to decisions impacting our desirable properties.
   - **Storage optimizations**: erasure coding or any other coding technique both increase the difficulty of placing data and synchronizing; we limit ourselves to duplication.
-  - **POSIX/Filesystem compatibility**: we do not aim at being POSIX compatible or to emulate any kind of filesystem. Indeed, in a distributed environment, such syncronizations are translated in network messages that impose severe constraints on the deployment.
+  - **POSIX/Filesystem compatibility**: we do not aim at being POSIX compatible or to emulate any kind of filesystem. Indeed, in a distributed environment, such synchronizations are translated in network messages that impose severe constraints on the deployment.
 
 ## Supported and planned protocols
 
@@ -30,37 +30,38 @@ Garage speaks (or will speak) the following protocols:
 
   - [S3](https://docs.aws.amazon.com/AmazonS3/latest/API/Welcome.html) - *SUPPORTED* - Enable applications to store large blobs such as pictures, video, images, documents, etc. S3 is versatile enough to also be used to publish a static website.
   - [IMAP](https://github.com/go-pluto/pluto) - *PLANNED* - email storage is quite complex to get good performances.
-To keep performances optimals, most imap servers only support on-disk storage.
+To keep performances optimal, most IMAP servers only support on-disk storage.
 We plan to add logic to Garage to make it a viable solution for email storage.
   - *More to come*
 
 ## Use Cases
 
 **[Deuxfleurs](https://deuxfleurs.fr) :** Garage is used by Deuxfleurs which is a non-profit hosting organization.
-Especially, it is used to host their main website, this documentation and some of its members's blogs. Additionally,
-Garage is used as a [backend for Nextcloud](https://docs.nextcloud.com/server/20/admin_manual/configuration_files/primary_storage.html). Deuxfleurs also plans to use Garage as their [Matrix's media backend](https://github.com/matrix-org/synapse-s3-storage-provider) and has the backend of [OCIS](https://github.com/owncloud/ocis).
+Especially, it is used to host their main website, this documentation and some of its members' blogs. 
+Additionally, Garage is used as a [backend for Nextcloud](https://docs.nextcloud.com/server/20/admin_manual/configuration_files/primary_storage.html). 
+Deuxfleurs also plans to use Garage as their [Matrix's media backend](https://github.com/matrix-org/synapse-s3-storage-provider) and as the backend of [OCIS](https://github.com/owncloud/ocis).
 
 *Are you using Garage? [Open a pull request](https://git.deuxfleurs.fr/Deuxfleurs/garage/) to add your organization here!*
 
 ## Comparison to existing software
 
-**[Minio](https://min.io/) :** Minio shares our *self-contained & lightweight* goal but selected two of our non-goals: *storage optimizations* through erasure coding and *POSIX/Filesystem compatibility* through strong consistency.
-However, by pursuing these two non-goals, minio do not reach our desirable properties.
-First, it fails on the *simple* property: due to the erasure coding, minio has severe limitations on how drives can be added or deleted from a cluster.
-Second, it fails on the *interned enabled* property: due to its strong consistency, minio is latency sensitive.
-Furthermore, minio has no knowledge of "sites" and thus can not distribute data to minimize the failure of a given site.
+**[MinIO](https://min.io/):** MinIO shares our *Self-contained & lightweight* goal but selected two of our non-goals: *Storage optimizations* through erasure coding and *POSIX/Filesystem compatibility* through strong consistency.
+However, by pursuing these two non-goals, MinIO do not reach our desirable properties.
+Firstly, it fails on the *Simple* property: due to the erasure coding, MinIO has severe limitations on how drives can be added or deleted from a cluster.
+Secondly, it fails on the *Internet enabled* property: due to its strong consistency, MinIO is latency sensitive.
+Furthermore, MinIO has no knowledge of "sites" and thus can not distribute data to minimize the failure of a given site.
 
-**[Openstack Swift](https://docs.openstack.org/swift/latest/) :**
-OpenStack Swift at least fails on the *self-contained & lightweight* goal.
-Starting it requires around 8Gb of RAM, which is too much especially in an hyperconverged infrastructure.
-It seems also to be far from *Simple*.
+**[Openstack Swift](https://docs.openstack.org/swift/latest/):**
+OpenStack Swift at least fails on the *Self-contained & lightweight* goal.
+Starting it requires around 8GB of RAM, which is too much especially in an hyperconverged infrastructure.
+We also do not classify Swift as *Simple*.
 
-**[Ceph](https://ceph.io/ceph-storage/object-storage/) :**
+**[Ceph](https://ceph.io/ceph-storage/object-storage/):**
 This review holds for the whole Ceph stack, including the RADOS paper, Ceph Object Storage module, the RADOS Gateway, etc.
-At is core, Ceph has been designed to provide *POSIX/Filesystem compatibility* which requires strong consistency, which in turn
-makes Ceph latency sensitive and fails our *Internet enabled* goal. 
-Due to its industry oriented design, Ceph is also far from being *Simple* to operate and from being *self-contained & lightweight* which makes it hard to integrate it in an hyperconverged infrastructure.
-In a certain way, Ceph and Minio are closer togethers than they are from Garage or OpenStack Swift.
+At its core, Ceph has been designed to provide *POSIX/Filesystem compatibility* which requires strong consistency, which in turn
+makes Ceph latency-sensitive and fails our *Internet enabled* goal. 
+Due to its industry oriented design, Ceph is also far from being *Simple* to operate and from being *Self-contained & lightweight* which makes it hard to integrate it in an hyperconverged infrastructure.
+In a certain way, Ceph and MinIO are closer together than they are from Garage or OpenStack Swift.
 
 *More comparisons are available in our [Related Work](design/related_work.md) chapter.*
 
@@ -71,7 +72,7 @@ We reference here other places on the Internet where you can learn more about Ga
 
 ### Rust API (docs.rs)
 
-If you encounter a specific bug in Garage or plan to patch it, you may jump directly to the source code documentation!
+If you encounter a specific bug in Garage or plan to patch it, you may jump directly to the source code's documentation!
 
   - [garage\_api](https://docs.rs/garage_api/latest/garage_api/) - contains the S3 standard API endpoint
   - [garage\_model](https://docs.rs/garage_model/latest/garage_model/) - contains Garage's model built on the table abstraction
@@ -84,16 +85,16 @@ If you encounter a specific bug in Garage or plan to patch it, you may jump dire
 
 We love to talk and hear about Garage, that's why we keep a log here:
 
-  - [(fr, 2020-12-02) Garage : jouer dans la cour des grands quand on est un hébergeur associatif](https://git.deuxfleurs.fr/Deuxfleurs/garage/src/branch/master/doc/20201202_talk/talk.pdf)
+  - [(fr, 2020-12-02) Garage : jouer dans la cour des grands quand on est un hébergeur associatif](https://git.deuxfleurs.fr/Deuxfleurs/garage/src/branch/main/doc/20201202_talk/talk.pdf)
 
 *Did you write or talk about Garage? [Open a pull request](https://git.deuxfleurs.fr/Deuxfleurs/garage/) to add a link here!*
 
 ## Community
 
 If you want to discuss with us, you can join our Matrix channel at [#garage:deuxfleurs.fr](https://matrix.to/#/#garage:deuxfleurs.fr).
-Our code and our issue tracker, which is the place where you should report bugs, are managed on [Deuxfleurs' Gitea](https://git.deuxfleurs.fr/Deuxfleurs/garage).
+Our code repository and issue tracker, which is the place where you should report bugs, is managed on [Deuxfleurs' Gitea](https://git.deuxfleurs.fr/Deuxfleurs/garage).
 
 ## License
 
-Garage, all the source code, is released under the [AGPL v3 License](https://www.gnu.org/licenses/agpl-3.0.en.html).
+Garage's source code, is released under the [AGPL v3 License](https://www.gnu.org/licenses/agpl-3.0.en.html).
 Please note that if you patch Garage and then use it to provide any service over a network, you must share your code!