Merge pull request #33 from sschuberth/master

Simplify package dependency definitions a bit in case of multiple versions
Bump the issue dates of all files which were touched in 71d4ef1

Signed-off-by: Sebastian Schuberth <sschuberth@gmail.com>
msys-openssh: Fix the libopenssl dll revision

Signed-off-by: Sebastian Schuberth <sschuberth@gmail.com>