Whitelisted X-Forwarded-For header support
Fixed redundant removal of trailing spaces
Fix new OnAdd/DeleteNetwork hooks for perl/python
Merge commit 'refs/pull/349/head' of github.com:znc/znc
X-Forwarded-For: verify the whole chain, from the end
Don't generate .pyc files ourself

It's good for cross-compilation, because in that case binaries produced
by CXX are not runnable.
Merge branch 'master' of github.com:znc/znc