yweb - small fix
fix sigc include
forgot 1 ;)
- nhttp: some minor code optimizations
- movieplayer: ask before stop temporary timeshift
- nhttp: enable threading

This is ported from neutrino-mp and contains code by martii and seife
from following commits:
20d3031b8bb47b5af79bf10c385e3564fe5c26dc
93d01c1987726c6ab344f69f799df03d5af8fe7a
363633dc1b9a508e244c7e1e51f6c1bbe699961c
c3e1310a2f727e26ce11669e3aeae78305f87049
Merge branch 'next-cc' into next (untested)
Merge branch 'next' into tangos