add missing and correct misspelled names, most in NAME sections;

found with regress/usr.bin/mandoc/db/dbm_dump;
OK jmc@

src/lib/libc/stdlib/labs.3

@@ -29,14 +29,15 @@
 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 .\" SUCH DAMAGE.
 .\"
-.\"	$OpenBSD: labs.3,v 1.15 2016/08/15 07:18:44 jmc Exp $
+.\"	$OpenBSD: labs.3,v 1.16 2017/08/01 14:57:02 schwarze Exp $
 .\"
-.Dd $Mdocdate: August 15 2016 $
+.Dd $Mdocdate: August 1 2017 $
 .Dt LABS 3
 .Os
 .Sh NAME
 .Nm labs ,
-.Nm llabs
+.Nm llabs ,
+.Nm qabs
 .Nd return the absolute value of a long integer
 .Sh SYNOPSIS
 .In stdlib.h

src/lib/libc/stdlib/lldiv.3

@@ -29,13 +29,14 @@
 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 .\" SUCH DAMAGE.
 .\"
-.\"	$OpenBSD: lldiv.3,v 1.7 2016/08/15 07:18:44 jmc Exp $
+.\"	$OpenBSD: lldiv.3,v 1.8 2017/08/01 14:57:02 schwarze Exp $
 .\"
-.Dd $Mdocdate: August 15 2016 $
+.Dd $Mdocdate: August 1 2017 $
 .Dt LLDIV 3
 .Os
 .Sh NAME
-.Nm lldiv
+.Nm lldiv ,
+.Nm qdiv
 .Nd return quotient and remainder from division
 .Sh SYNOPSIS
 .In stdlib.h