Move admin application settings to own path

[ci skip]

doc/README.md

@@ -21,7 +21,7 @@
 
 ## Administrator documentation
 
-- [Access restrictions](administration/access_restrictions.md) Define which Git access protocols can be used to talk to GitLab
+- [Access restrictions](user/admin_area/settings/visibility_and_access_controls.md#enabled-git-access-protocols) Define which Git access protocols can be used to talk to GitLab
 - [Authentication/Authorization](administration/auth/README.md) Configure
   external authentication with LDAP, SAML, CAS and additional Omniauth providers.
 - [Custom Git hooks](administration/custom_hooks.md) Custom Git hooks (on the filesystem) for when webhooks aren't enough.

doc/user/admin_area/settings/sign_up_restrictions.md

@@ -0,0 +1,22 @@
+# Sign-up restrictions
+
+## Blacklist email domains
+
+> [Introduced][ce-5259] in GitLab 8.10.
+
+With this feature enabled, you can block email addresses of a specific domain
+from creating an account on your GitLab server. This is particularly useful to
+prevent spam. Disposable email addresses are usually used by malicious users to
+create dummy accounts and spam issues.
+
+This feature can be activated via the **Application Settings** in the Admin area,
+and you have the option of entering the list manually, or uploading a file with
+the list.
+
+The blacklist accepts wildcards, so you can use `*.test.com` to block every
+`test.com` subdomain, or `*.io` to block all domains ending in `.io`. Domains
+should be separated by a whitespace, semicolon, comma, or a new line.
+
+![Domain Blacklist](img/domain_blacklist.png)
+
+[ce-5259]: https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/5259

doc/user/admin_area/settings/visibility_and_access_controls.md

@@ -1,6 +1,8 @@
-# Access Restrictions
+# Visibility and access controls
 
-> **Note:** These features are only available on versions 8.10 and above.
+## Enabled Git access protocols
+
+> [Introduced][ce-4696] in GitLab 8.10.
 
 With GitLab's Access restrictions you can choose which Git access protocols you
 want your users to use to communicate with GitLab. This feature can be enabled
@@ -15,8 +17,6 @@ to choose between:
 
 ![Settings Overview](img/access_restrictions.png)
 
-## Enabled Protocol
-
 When both SSH and HTTP(S) are enabled, GitLab will behave as usual, it will give
 your users the option to choose which protocol they would like to use.
 
@@ -37,20 +37,4 @@ not selected.
   HTTP, will still be accessible. What GitLab does is restrict access on the
   application level.
 
-## Blacklist email domains
-
-With this feature enabled, you can block email addresses of a specific domain
-from creating an account on your GitLab server. This is particularly useful to
-prevent spam. Disposable email addresses are usually used by malicious users to
-create dummy accounts and spam issues.
-
-This feature can be activated via the `Application Settings` in the Admin area,
-and you have the option of entering the list manually, or uploading a file with
-the list.
-
-The blacklist accepts wildcards, so you can use `*.test.com` to block every
-`test.com` subdomain, or `*.io` to block all domains ending in `.io`. Domains
-should be separated by a whitespace, semicolon, comma, or a new line.
-
-![Domain Blacklist](img/domain_blacklist.png)
-
+[ce-4696]: https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/4696