Set more environment variables to allow their use in custom hooks

[afdev82]

In order to write custom hooks that use some variables, Gitea should export them in the environment.

For example, currently I need to know the user that is pushing a branch.
I think this could be easily done adding an os.Setenv line like here.

[strk]

#317 adds one such variable, do you have a list of variables you think should be exposed ?

[afdev82]

@strk Yes, I opened the #317 😛
I don't have a list, I think it's enough to know the user that is pushing (for my actual needs).
I saw that also the gogs/gogs#3921, I think we should agree how many variables to expose and document that.
I exported the name, because I don't think it's a good idea to expose the id. IMHO for a custom hook it would be enough to have the name (to whitelist it).

[lunny]

since #317 is in 1.1, so I change this to 1.1

[tboerger]

I would take that into the 1.0 release because users like @afdev82 are able to provide hooks for protected branches until we release native protected branches. This change is quite simple.

[lunny]

Then what's the status of #317? If #317 will be merged in 1.0, this could be changed to 1.0

[tboerger]

It just needs another lgtm

[bkcsoft]

@afdev82 was this supposed to be closed with #317 ? otherwise feel free to reopen it (it got closed automagically by merging 317)

[afdev82]

@bkcsoft Yes, it's fine. Thanks ;)