test formatting all code in with clang style

[Jammyjamjamman]

shared_lib/{sources/{feathery_ftp,libircclient},include/libircclient} excluded because it doesn't work with them and they're dependencies, not part of mg project

Command used: find . ( -iname ".h" -o -iname ".cpp" -o -iname ".hpp" -o -iname ".c" ) -exec clang-format -i {} ;