Document new config variable

Author: kjellkvinge

custom/conf/app.ini.sample

@@ -67,6 +67,8 @@ EXPLORE_PAGING_NUM = 20
 ISSUE_PAGING_NUM = 10
 ; Number of maximum commits displayed in one activity feed
 FEED_MAX_COMMIT_NUM = 5
+; Number of maximum commits displayed in commit graph.
+GRAPH_MAX_COMMIT_NUM = 100
 ; Value of `theme-color` meta tag, used by Android >= 5.0
 ; An invalid color like "none" or "disable" will have the default style
 ; More info: https://developers.google.com/web/updates/2014/11/Support-for-theme-color-in-Chrome-39-for-Android

docs/content/doc/advanced/config-cheat-sheet.en-us.md

@@ -68,6 +68,7 @@ Values containing `#` or `;` must be quoted using `` ` `` or `"""`.
 - `EXPLORE_PAGING_NUM`: **20**: Number of repositories that are shown in one explore page.
 - `ISSUE_PAGING_NUM`: **10**: Number of issues that are shown in one page (for all pages that list issues).
 - `FEED_MAX_COMMIT_NUM`: **5**: Number of maximum commits shown in one activity feed.
+- `GRAPH_MAX_COMMIT_NUM`: **100**: Number of maximum commits shown in the commit graph.
 - `DEFAULT_THEME`: **gitea**: \[gitea, arc-green\]: Set the default theme for the Gitea install.
 
 ### UI - Admin (`ui.admin`)