Document the negative commit message push rule for the API.

doc/api/projects.md

@@ -1631,6 +1631,7 @@ GET /projects/:id/push_rule
   "id": 1,
   "project_id": 3,
   "commit_message_regex": "Fixes \d+\..*",
+  "commit_message_negative_regex": "ssh\:\/\/",
   "branch_name_regex": "",
   "deny_delete_tag": false,
   "created_at": "2012-10-12T17:04:47Z",
@@ -1663,18 +1664,19 @@ Adds a push rule to a specified project.
 POST /projects/:id/push_rule
 ```
 
-| Attribute                              | Type           | Required | Description |
-| -------------------------------------- | -------------- | -------- | ----------- |
-| `id`                                   | integer/string | yes      | The ID of the project or NAMESPACE/PROJECT_NAME |
-| `deny_delete_tag` **(STARTER)**        | boolean        | no       | Deny deleting a tag |
-| `member_check` **(STARTER)**           | boolean        | no       | Restrict commits by author (email) to existing GitLab users |
-| `prevent_secrets` **(STARTER)**        | boolean        | no       | GitLab will reject any files that are likely to contain secrets |
-| `commit_message_regex` **(STARTER)**   | string         | no       | All commit messages must match this, e.g. `Fixed \d+\..*` |
-| `branch_name_regex` **(STARTER)**      | string         | no       | All branch names must match this, e.g. `(feature|hotfix)\/*` |
-| `author_email_regex` **(STARTER)**     | string         | no       | All commit author emails must match this, e.g. `@my-company.com$` |
-| `file_name_regex` **(STARTER)**        | string         | no       | All commited filenames must **not** match this, e.g. `(jar|exe)$` |
-| `max_file_size` **(STARTER)**          | integer        | no       | Maximum file size (MB) |
-| `commit_committer_check` **(PREMIUM)** | boolean        | no       | Users can only push commits to this repository that were committed with one of their own verified emails. |
+| Attribute                                     | Type           | Required | Description |
+| --------------------------------------------- | -------------- | -------- | ----------- |
+| `id`                                          | integer/string | yes      | The ID of the project or NAMESPACE/PROJECT_NAME |
+| `deny_delete_tag` **(STARTER)**               | boolean        | no       | Deny deleting a tag |
+| `member_check` **(STARTER)**                  | boolean        | no       | Restrict commits by author (email) to existing GitLab users |
+| `prevent_secrets` **(STARTER)**               | boolean        | no       | GitLab will reject any files that are likely to contain secrets |
+| `commit_message_regex` **(STARTER)**          | string         | no       | All commit messages must match this, e.g. `Fixed \d+\..*` |
+| `commit_message_negative_regex` **(STARTER)** | string         | no       | No commit message is allowed to match this, e.g. `ssh\:\/\/` |
+| `branch_name_regex` **(STARTER)**             | string         | no       | All branch names must match this, e.g. `(feature|hotfix)\/*` |
+| `author_email_regex` **(STARTER)**            | string         | no       | All commit author emails must match this, e.g. `@my-company.com$` |
+| `file_name_regex` **(STARTER)**               | string         | no       | All commited filenames must **not** match this, e.g. `(jar|exe)$` |
+| `max_file_size` **(STARTER)**                 | integer        | no       | Maximum file size (MB) |
+| `commit_committer_check` **(PREMIUM)**        | boolean        | no       | Users can only push commits to this repository that were committed with one of their own verified emails. |
 
 ### Edit project push rule
 
@@ -1684,18 +1686,19 @@ Edits a push rule for a specified project.
 PUT /projects/:id/push_rule
 ```
 
-| Attribute                              | Type           | Required | Description |
-| -------------------------------------- | -------------- | -------- | ----------- |
-| `id`                                   | integer/string | yes      | The ID of the project or NAMESPACE/PROJECT_NAME |
-| `deny_delete_tag` **(STARTER)**        | boolean        | no       | Deny deleting a tag |
-| `member_check` **(STARTER)**           | boolean        | no       | Restrict commits by author (email) to existing GitLab users |
-| `prevent_secrets` **(STARTER)**        | boolean        | no       | GitLab will reject any files that are likely to contain secrets |
-| `commit_message_regex` **(STARTER)**   | string         | no       | All commit messages must match this, e.g. `Fixed \d+\..*` |
-| `branch_name_regex` **(STARTER)**      | string         | no       | All branch names must match this, e.g. `(feature|hotfix)\/*` |
-| `author_email_regex` **(STARTER)**     | string         | no       | All commit author emails must match this, e.g. `@my-company.com$` |
-| `file_name_regex` **(STARTER)**        | string         | no       | All commited filenames must **not** match this, e.g. `(jar|exe)$` |
-| `max_file_size` **(STARTER)**          | integer        | no       | Maximum file size (MB) |
-| `commit_committer_check` **(PREMIUM)** | boolean        | no       | Users can only push commits to this repository that were committed with one of their own verified emails. |
+| Attribute                                     | Type           | Required | Description |
+| --------------------------------------------- | -------------- | -------- | ----------- |
+| `id`                                          | integer/string | yes      | The ID of the project or NAMESPACE/PROJECT_NAME |
+| `deny_delete_tag` **(STARTER)**               | boolean        | no       | Deny deleting a tag |
+| `member_check` **(STARTER)**                  | boolean        | no       | Restrict commits by author (email) to existing GitLab users |
+| `prevent_secrets` **(STARTER)**               | boolean        | no       | GitLab will reject any files that are likely to contain secrets |
+| `commit_message_regex` **(STARTER)**          | string         | no       | All commit messages must match this, e.g. `Fixed \d+\..*` |
+| `commit_message_negative_regex` **(STARTER)** | string         | no       | No commit message is allowed to match this, e.g. `ssh\:\/\/` |
+| `branch_name_regex` **(STARTER)**             | string         | no       | All branch names must match this, e.g. `(feature|hotfix)\/*` |
+| `author_email_regex` **(STARTER)**            | string         | no       | All commit author emails must match this, e.g. `@my-company.com$` |
+| `file_name_regex` **(STARTER)**               | string         | no       | All commited filenames must **not** match this, e.g. `(jar|exe)$` |
+| `max_file_size` **(STARTER)**                 | integer        | no       | Maximum file size (MB) |
+| `commit_committer_check` **(PREMIUM)**        | boolean        | no       | Users can only push commits to this repository that were committed with one of their own verified emails. |
 
 ### Delete project push rule