Fix link in README

Shouldn't start with a leading slash.

README.md

@@ -18,7 +18,7 @@ An overview of the four cases described above:
 1. git pull over SSH -> gitlab-shell -> API call to gitlab-rails (Authorization) -> accept or decline -> establish Gitaly session
 1. git push over SSH -> gitlab-shell (git command is not executed yet) -> establish Gitaly session -> (in Gitaly) gitlab-shell pre-receive hook -> API call to gitlab-rails (authorization) -> accept or decline push
 
-[Full feature list](/doc/features.md)
+[Full feature list](doc/features.md)
 
 ## Code status
 
@@ -115,7 +115,7 @@ guidelines:
 
 GitLab Shell performs rate-limiting by user account and project for git operations. GitLab Shell accepts git operation requests and then makes a call to the Rails rate-limiter (backed by Redis). If the `user + project` exceeds the rate limit then GitLab Shell will then drop further connection requests for that `user + project`.
 
-The rate-limiter is applied at the git command (plumbing) level. Each command has a rate limit of 600/minute. For example, `git push` has 600/minute and `git pull` has another 600/minute. 
+The rate-limiter is applied at the git command (plumbing) level. Each command has a rate limit of 600/minute. For example, `git push` has 600/minute and `git pull` has another 600/minute.
 
 Because they are using the same plumbing command `git-upload-pack`, `git pull` and `git clone` are in effect the same command for the purposes of rate-limiting.