x11/hs-xmobar: Add new dependencies regrading upstream changes on default plugins
Upstream recently had to change default dependency for its default plugins
from HTTP to HTTPS.
Change the dependencies to regard that.
While here clean up USE_XORG option to make poudriere happier.

Reviewed by: arrowd (maintainer, Haskell@)
Approved by: arrowd (maintainer, Haskell@)
Differential Revision: https://reviews.freebsd.org/D19493