netbsd: use compile-time OS flag, in same places as freebsd - thanks Thomas Klausner
netbsd: Add missing header for strerror() - thanks Thomas Klausner
lang: use proper interface to get position within File - thanks Thomas Klausner
netbsd: avoid referring to QGtkStyle, not a public symbol - thanks Thomas Klausner
build rules: neater check for Linux-or-*BSD, thanks Tim Blechmann
Merge branch 'master' into netbsd

Conflicts:
	lang/LangPrimSource/PyrPrimitive.cpp
	server/scsynth/CMakeLists.txt
cmake: simplify more of the linux-or-similar checks
Merge pull request #1088 from supercollider/netbsd

Netbsd compatibility