Replace `$pkgname` with actual package names in all packages.

This commit affects over one hundred packages.

For future reference, this was run:

    for p in * ; do (
        . $p/PKGBUILD
        sed -i "s/\\\${\?pkgname}\?/$pkgname/g" PKGBUILD;)
    done
CONTRIBUTORS: Add another name.
Revert "CONTRIBUTORS: Add another name."

This reverts commit 777736aa0ac6d94d2065cab987c694bbfe64920f.

The name was a duplicate.
Add 'scripts/blackarch-chroot'.
Merge remote-tracking branch 'upstream/master'

syncing my repo
added hackersh per issue #167
added tlssled per issue #103
added vulscan per issue #121
added Pengyu CHEN <cpy.prefers.you@gmail.com> to contributors for pymssql
added pymssql as a dependency of hexorbase
added Devaev Maxim <mdevaev@gmail.com> to contribiutors as needed by dependency python2-mysqldb
added hexorbase per issue #60
added python2-mysqldb as a dependency for hexorbase