misc/56670: manual entry for pthread_setschedprio() missing

[andrew.cagney%gmail.com@localhost]

>Number:         56670
>Category:       misc
>Synopsis:       manual entry for pthread_setschedprio() missing
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    misc-bug-people
>State:          open
>Class:          doc-bug
>Submitter-Id:   net
>Arrival-Date:   Tue Jan 25 20:30:00 +0000 2022
>Originator:     Andrew Cagney
>Release:        9.2_STABLE
>Organization:
>Environment:
NetBSD arm64 9.2_STABLE NetBSD 9.2_STABLE (GENERIC64) #0: Sun Jun 13 09:44:30 EDT 2021
>Description:
The function is there (ya, one less portability issue), but no documentation.

>How-To-Repeat:
arm64$ grep pthread_setschedprio /usr/include/*.h
/usr/include/pthread.h:int      pthread_setschedprio(pthread_t, int);
arm64$ man pthread_setschedprio
man: no entry for pthread_setschedprio in the manual.

>Fix: