fixed maximum avatar size in changelog
Prevent 500 error if cant detect branches for commit
Merge pull request #5416 from Popl7/fix_max_size_avatar_upload_readme

fixed maximum avatar size in changelog
Typo fixed

"ssending" to "sending"
Expand refs constraints to include valid characters

Fixes #4831, #4865, #4932
Merge pull request #4968 from pdf/issue_4831

Expand refs constraints to include valid characters
Merge pull request #5428 from weisjohn/patch-2

Typo fixed