Fix spelling errors in access-control.txt

Change-Id: I303ce6c898f6107b1b1d59756917bf474d9b7252
(cherry picked from commit a28a1d2b1cdb755910bfc55b311c78ae163ac948)
diff --git a/Documentation/access-control.txt b/Documentation/access-control.txt
index 558b784..100e473 100644
--- a/Documentation/access-control.txt
+++ b/Documentation/access-control.txt
@@ -56,7 +56,7 @@
 ~~~~~~~~~~~~~~~~~~~~~
 
 This is an internal user group, members of this group are not expected
-to perform interactive operations on the Gerrit web frontend.
+to perform interactive operations on the Gerrit web front-end.
 
 However, sometimes such a user may need a separate thread pool in
 order to prevent it from grabbing threads from the interactive users.
@@ -607,7 +607,7 @@
 ~~~~~~~~~~~~~~~~~~~~
 
 The `Push Merge Commit` access right permits the user to upload merge
-commits.  It's an addon to the <<category_push,Push>> access right, and
+commits.  It's an add-on to the <<category_push,Push>> access right, and
 so it won't be sufficient with only `Push Merge Commit` granted for a
 push to happen.  Some projects wish to restrict merges to being created
 by Gerrit. By granting `Push` without `Push Merge Commit`, the only
@@ -887,7 +887,7 @@
 CI system
 ~~~~~~~~~
 
-A typical Continous Integration system should be able to download new changes
+A typical Continuous Integration system should be able to download new changes
 to build and then leave a verdict somehow.
 
 As an example, the popular
@@ -960,7 +960,7 @@
 also have the power to configure access rights in gits assigned to them.
 
 [WARNING]
-These users should be really knowledgable about git, for instance knowing why
+These users should be really knowledgeable about git, for instance knowing why
 tags never should be removed from a server.  This role is granted potentially
 destructive access rights and cleaning up after such a mishap could be time
 consuming!
@@ -1110,8 +1110,8 @@
 
 ====
   [access "refs/heads/stable*"]
-    label-Release-Proces = block -1..+1 group Anonymous Users
-    label-Release-Proces = -1..+1 group Release Engineers
+    label-Release-Process = block -1..+1 group Anonymous Users
+    label-Release-Process = -1..+1 group Release Engineers
 ====
 
 
@@ -1146,7 +1146,7 @@
 In Gerrit 2.2.x, the way to set permissions for upload has changed entirely.
 To upload a change for review is no longer a separate permission type,
 instead you grant ordinary push permissions to the actual
-recieving reference. In practice this means that you set push permissions
+receiving reference. In practice this means that you set push permissions
 on `refs/for/refs/heads/<branch>` rather than permissions to upload changes
 on `refs/heads/<branch>`.
 
@@ -1241,7 +1241,7 @@
 Allow the operation of the link:cmd-kill.html[kill command over ssh].  The
 kill command ends tasks that currently occupy the Gerrit server, usually
 a replication task or a user initiated task such as an upload-pack or
-recieve-pack.
+receive-pack.
 
 
 [[capability_priority]]