[3.0] contrib: upnp: fix detached thread usage
Backported from master.
And backport the recent mingw/pthread cleanup in contribs. We have a working winpthread in 3.0
Edited by Steve Lhomme
Backported from master.
And backport the recent mingw/pthread cleanup in contribs. We have a working winpthread in 3.0
VideoLAN code repository instance