change Xrs from now-defunct db(3) to dbopen(3); this wasn;t a

straight replace: thanks both to schwarze and maja for feedback
on how to rewrite parts;
i've snuck in an rcs id->openbsd id change in dev_mkdb too;

src/lib/libc/stdlib/bsearch.3

@@ -29,9 +29,9 @@
 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 .\" SUCH DAMAGE.
 .\"
-.\"	$OpenBSD: bsearch.3,v 1.9 2013/06/05 03:39:23 tedu Exp $
+.\"	$OpenBSD: bsearch.3,v 1.10 2015/11/30 17:03:05 jmc Exp $
 .\"
-.Dd $Mdocdate: June 5 2013 $
+.Dd $Mdocdate: November 30 2015 $
 .Dt BSEARCH 3
 .Os
 .Sh NAME
@@ -73,7 +73,7 @@ function returns a pointer to a matching member of the array, or a null
 pointer if no match is found.
 If two members compare as equal, which member is matched is unspecified.
 .Sh SEE ALSO
-.Xr db 3 ,
+.Xr dbopen 3 ,
 .Xr lsearch 3 ,
 .Xr qsort 3 ,
 .Xr tsearch 3

src/lib/libc/stdlib/lsearch.3

@@ -1,4 +1,4 @@
-.\"	$OpenBSD: lsearch.3,v 1.13 2015/02/15 02:02:53 tedu Exp $
+.\"	$OpenBSD: lsearch.3,v 1.14 2015/11/30 17:03:05 jmc Exp $
 .\"
 .\" Copyright (c) 1989, 1991, 1993
 .\"	The Regents of the University of California.  All rights reserved.
@@ -29,7 +29,7 @@
 .\"
 .\"     @(#)lsearch.3	8.1 (Berkeley) 6/4/93
 .\"
-.Dd $Mdocdate: February 15 2015 $
+.Dd $Mdocdate: November 30 2015 $
 .Dt LSEARCH 3
 .Os
 .Sh NAME
@@ -95,7 +95,7 @@ the location referenced by the argument
 is incremented by one.
 .Sh SEE ALSO
 .Xr bsearch 3 ,
-.Xr db 3
+.Xr dbopen 3
 .Sh STANDARDS
 The
 .Fn lsearch