libc: Move tzset.3 to stdtime

This really belongs in stddime, since it documents interfaces
implemented in stdtime.

Suggested by:	brooks
Sponsored by:	Netflix

lib/libc/gen/Makefile.inc

@@ -308,7 +308,6 @@ MAN+=	alarm.3 \
 	timespec_get.3 \
 	timespec_getres.3 \
 	ttyname.3 \
-	tzset.3 \
 	ualarm.3 \
 	ucontext.3 \
 	ulimit.3 \
@@ -534,8 +533,6 @@ MLINKS+=tcsetattr.3 cfgetispeed.3 \
 	tcsetattr.3 tcgetattr.3
 MLINKS+=ttyname.3 isatty.3 \
 	ttyname.3 ttyname_r.3
-MLINKS+=tzset.3 daylight.3 \
-	tzset.3 timezone.3
 MLINKS+=unvis.3 strunvis.3 \
 	unvis.3 strunvisx.3
 MLINKS+=vis.3 nvis.3 \

lib/libc/stdtime/Makefile.inc

@@ -20,7 +20,7 @@ CFLAGS.localtime.c+= -DALL_STATE -DTHREAD_SAFE
 CFLAGS.localtime.c+= -DDETECT_TZ_CHANGES
 .endif
 
-MAN+=	ctime.3 strftime.3 strptime.3 time2posix.3
+MAN+=	ctime.3 strftime.3 strptime.3 time2posix.3 tzset.3
 MAN+=	tzfile.5
 
 MLINKS+=ctime.3 asctime.3 ctime.3 difftime.3 ctime.3 gmtime.3 \
@@ -30,3 +30,5 @@ MLINKS+=ctime.3 asctime.3 ctime.3 difftime.3 ctime.3 gmtime.3 \
 MLINKS+=strftime.3 strftime_l.3
 MLINKS+=strptime.3 strptime_l.3
 MLINKS+=time2posix.3 posix2time.3
+MLINKS+=tzset.3 daylight.3 \
+	tzset.3 timezone.3