pidgin/pidgin

Don't allow libraries to include their own global header files.

Testing Done:
Compiled, ran unit tests, and built the docs

Reviewed at https://reviews.imfreedom.org/r/232/
syntax: glob
.*.swp
.DS_Store
.flatpak-builder
*.pyc
*~
\#*\#
subprojects/*/
syntax: regexp
^build(.+)?\/
win32-install-dir(\.release)?