Add multiple projects support
Attempt 2
Closes: #6 (closed)
Usage:
./glhf \
-gitlab-project 'https://gitlab.freedesktop.org/wlroots/wlroots' \
-gitlab-project 'https://gitlab.freedesktop.org/wayland/wayland;w' \
-gitlab-project 'https://gitlab.freedesktop.org/wayland/wayland-protocols;w-p' \
...
Note: this was 1) written by someone who hasn't touched Go in 5 years and 2) tested very briefly.