added tempering system for GXS, so as to not send more in the outqueues than what the current bandwidth can handle.

git-svn-id: http://svn.code.sf.net/p/retroshare/code/trunk@7654 b45a01b8-16f6-495d-af2f-9b41ad6348cc
fixed compilation after removing operators!= (patch from phenom)

git-svn-id: http://svn.code.sf.net/p/retroshare/code/trunk@7655 b45a01b8-16f6-495d-af2f-9b41ad6348cc