Fix library names.

lib/libc/sys/mq_close.2

@@ -34,7 +34,7 @@
 .Nm mq_close
 .Nd "close a message queue (REALTIME)"
 .Sh LIBRARY
-.Lb libc
+.Lb librt
 .Sh SYNOPSIS
 .In mqueue.h
 .Ft int

lib/libc/sys/mq_getattr.2

@@ -34,7 +34,7 @@
 .Nm mq_getattr
 .Nd "get message queue attributes (REALTIME)"
 .Sh LIBRARY
-.Lb libc
+.Lb librt
 .Sh SYNOPSIS
 .In mqueue.h
 .Ft int

lib/libc/sys/mq_notify.2

@@ -34,7 +34,7 @@
 .Nm mq_notify
 .Nd "notify process that a message is available (REALTIME)"
 .Sh LIBRARY
-.Lb libc
+.Lb librt
 .Sh SYNOPSIS
 .In mqueue.h
 .Ft int

lib/libc/sys/mq_open.2

@@ -34,7 +34,7 @@
 .Nm mq_open
 .Nd "open a message queue (REALTIME)"
 .Sh LIBRARY
-.Lb libc
+.Lb librt
 .Sh SYNOPSIS
 .In mqueue.h
 .Ft mqd_t

lib/libc/sys/mq_receive.2

@@ -34,7 +34,7 @@
 .Nm mq_receive , mq_timedreceive
 .Nd "receive a message from message queue (REALTIME)"
 .Sh LIBRARY
-.Lb libc
+.Lb librt
 .Sh SYNOPSIS
 .In mqueue.h
 .Ft ssize_t

lib/libc/sys/mq_send.2

@@ -34,7 +34,7 @@
 .Nm mq_send , mq_timedsend
 .Nd "send a message to message queue (REALTIME)"
 .Sh LIBRARY
-.Lb libc
+.Lb librt
 .Sh SYNOPSIS
 .In mqueue.h
 .Ft int

lib/libc/sys/mq_setattr.2

@@ -34,7 +34,7 @@
 .Nm mq_setattr
 .Nd "set message queue attributes (REALTIME)"
 .Sh LIBRARY
-.Lb libc
+.Lb librt
 .Sh SYNOPSIS
 .In mqueue.h
 .Ft int

lib/libc/sys/timer_create.2

@@ -34,7 +34,7 @@
 .Nm timer_create
 .Nd "create a per-process timer (REALTIME)"
 .Sh LIBRARY
-.Lb libc
+.Lb librt
 .Sh SYNOPSIS
 .In time.h
 .Ft int

lib/libc/sys/timer_delete.2

@@ -34,7 +34,7 @@
 .Nm timer_delete
 .Nd "delete a per-process timer (REALTIME)"
 .Sh LIBRARY
-.Lb libc
+.Lb librt
 .Sh SYNOPSIS
 .In time.h
 .Ft int

lib/libc/sys/timer_settime.2

@@ -36,7 +36,7 @@
 .Nm timer_settime
 .Nd "per-process timers (REALTIME)"
 .Sh LIBRARY
-.Lb libc
+.Lb librt
 .Sh SYNOPSIS
 .In time.h
 .Ft int