GitLab

Since if someone previously had `GDAL` in their requirements file, they
would already have the gdalserver binary present from `bin/steps/gdal`
but be missing the proj and geos vendor files. By checking for `proj`
instead, we ensure that the vendoring isn't incorrectly skipped in this
case.

Since we need to set it regardless of whether the vendored library
existed previously or not.

To save the 301s.

Some people use pyOpenSSL (it is the literal name, e.g.: https://pypi.python.org/pypi/pyOpenSSL)