Merged https://svnweb.freebsd.org/ports?view=revision&revision=423993

Fixed compilation error on 9.3

In D3490#73596, @jbeich wrote:

Likely superseded by rP395967. If there's anything left to salvage better open new differential.

In D3499#71896, @kwm wrote:

Oh now I see the other ports. I think this would be more clear if there was 1 patch/review for all the ports instead of spreading them around in 1 review per patch. Since they depend quite closely with each other.

As of 0.23.1 libgit2 has optional dependency for libcurl.so

Should I put all those patches in separate diffs?

Looks like libgit2-glibc as well. Probably, gitg as well. Will do them all in a bit.

Also, issue with bundled libgit2 can be solved by updating port. I haz the patch.