Unable to push tags if the repository has "verify committer" enabled

[gitblit]

Originally reported on Google Code with ID 340

What steps will reproduce the problem?
1. Enable verify committer in a repository
2. Create a tag for a commit by a different user
3. Push tag

Expected outcome
Tag is successfully pushed

Actual outcome
Push fails with the following message:
 ! [remote rejected] tagName -> tagName (6989d1c8f2cfafd61b802d13df6cf59e70cf3b57 by
Will May <email@example.com> was not committed by otheruser (otheruser))

What version of the product are you using? On what operating system?
Gitblit version 1.3.2 on RHEL 5

Please provide any additional information below.
The use case behind allowing tags by other users is to allow an automated tool to tag
a particular commit during a nightly build

Reported by will.j.may on 2013-11-18 14:48:48

[gitblit]

This also affects tag deletion:
 ! [remote rejected] <tag> (deletion prohibited)

Reported by meyerm1 on 2014-06-19 09:12:38

[gitblit]

The potential fix for this issue would be here (https://github.com/coolersport/gitblit/compare/v1.4.1-patch).
However, I'm unsure of its side effect due to limited knowledge on git/gitblit.

Reported by tiendung.tran on 2014-11-16 21:33:26

[Ryan-Miao]

I also cannot create a new branch if the master has the commit by others, how to disable verify committer