Konstantin Belousov cbc158449b Implement WNOWAIT flag for wait4(2). It specifies that process whose status
is returned shall be kept in the waitable state.
Add WSTOPPED as an alias for WUNTRACED.

Submitted by:	Jukka Ukkonen <jau at iki fi>
PR:	standards/116221
MFC after:	2 weeks
2008-08-26 12:37:16 +00:00
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