Replace all 14 instances of .St -ansiC-99 in our tree with .St -isoC-99.

The former is not used anywhere in NetBSD, FreeBSD, or DragonFly
and not supported by groff, so i'm going to delete it from mandoc(1).
We don't need two macros for the same thing.

src/lib/libc/stdlib/atol.3

@@ -29,9 +29,9 @@
 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 .\" SUCH DAMAGE.
 .\"
-.\"	$OpenBSD: atol.3,v 1.8 2013/06/05 03:39:23 tedu Exp $
+.\"	$OpenBSD: atol.3,v 1.9 2014/11/30 21:21:59 schwarze Exp $
 .\"
-.Dd $Mdocdate: June 5 2013 $
+.Dd $Mdocdate: November 30 2014 $
 .Dt ATOL 3
 .Os
 .Sh NAME
@@ -67,4 +67,4 @@ strtol(nptr, (char **)NULL, 10);
 The
 .Fn atol
 function conforms to
-.St -ansiC-99 .
+.St -isoC-99 .

src/lib/libc/stdlib/atoll.3

@@ -29,9 +29,9 @@
 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 .\" SUCH DAMAGE.
 .\"
-.\"	$OpenBSD: atoll.3,v 1.6 2013/06/05 03:39:23 tedu Exp $
+.\"	$OpenBSD: atoll.3,v 1.7 2014/11/30 21:21:59 schwarze Exp $
 .\"
-.Dd $Mdocdate: June 5 2013 $
+.Dd $Mdocdate: November 30 2014 $
 .Dt ATOLL 3
 .Os
 .Sh NAME
@@ -67,4 +67,4 @@ strtoll(nptr, (char **)NULL, 10);
 The
 .Fn atoll
 function conforms to
-.St -ansiC-99 .
+.St -isoC-99 .

src/lib/libc/stdlib/exit.3

@@ -29,9 +29,9 @@
 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 .\" SUCH DAMAGE.
 .\"
-.\"	$OpenBSD: exit.3,v 1.15 2013/07/17 05:42:11 schwarze Exp $
+.\"	$OpenBSD: exit.3,v 1.16 2014/11/30 21:21:59 schwarze Exp $
 .\"
-.Dd $Mdocdate: July 17 2013 $
+.Dd $Mdocdate: November 30 2014 $
 .Dt EXIT 3
 .Os
 .Sh NAME
@@ -86,7 +86,7 @@ function never returns.
 The
 .Fn exit
 function conforms to
-.St -ansiC-99 .
+.St -isoC-99 .
 .Sh HISTORY
 An
 .Fn exit

src/lib/libc/stdlib/imaxabs.3

@@ -29,9 +29,9 @@
 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 .\" SUCH DAMAGE.
 .\"
-.\"	$OpenBSD: imaxabs.3,v 1.6 2013/06/05 03:39:23 tedu Exp $
+.\"	$OpenBSD: imaxabs.3,v 1.7 2014/11/30 21:21:59 schwarze Exp $
 .\"
-.Dd $Mdocdate: June 5 2013 $
+.Dd $Mdocdate: November 30 2014 $
 .Dt IMAXABS 3
 .Os
 .Sh NAME
@@ -60,6 +60,6 @@ function returns the absolute value.
 The
 .Fn imaxabs
 function conforms to
-.St -ansiC-99 .
+.St -isoC-99 .
 .Sh BUGS
 The absolute value of the most negative integer remains negative.

src/lib/libc/stdlib/imaxdiv.3

@@ -29,9 +29,9 @@
 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 .\" SUCH DAMAGE.
 .\"
-.\"	$OpenBSD: imaxdiv.3,v 1.5 2013/06/05 03:39:23 tedu Exp $
+.\"	$OpenBSD: imaxdiv.3,v 1.6 2014/11/30 21:21:59 schwarze Exp $
 .\"
-.Dd $Mdocdate: June 5 2013 $
+.Dd $Mdocdate: November 30 2014 $
 .Dt IMAXDIV 3
 .Os
 .Sh NAME
@@ -63,4 +63,4 @@ and
 The
 .Fn imaxdiv
 function conforms to
-.St -ansiC-99 .
+.St -isoC-99 .

src/lib/libc/stdlib/labs.3

@@ -29,9 +29,9 @@
 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 .\" SUCH DAMAGE.
 .\"
-.\"	$OpenBSD: labs.3,v 1.12 2014/01/19 05:21:12 schwarze Exp $
+.\"	$OpenBSD: labs.3,v 1.13 2014/11/30 21:21:59 schwarze Exp $
 .\"
-.Dd $Mdocdate: January 19 2014 $
+.Dd $Mdocdate: November 30 2014 $
 .Dt LABS 3
 .Os
 .Sh NAME
@@ -64,6 +64,6 @@ The
 and
 .Fn llabs
 functions conform to
-.St -ansiC-99 .
+.St -isoC-99 .
 .Sh BUGS
 The absolute value of the most negative integer remains negative.

src/lib/libc/stdlib/lldiv.3

@@ -29,9 +29,9 @@
 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 .\" SUCH DAMAGE.
 .\"
-.\"	$OpenBSD: lldiv.3,v 1.4 2013/06/05 03:39:23 tedu Exp $
+.\"	$OpenBSD: lldiv.3,v 1.5 2014/11/30 21:21:59 schwarze Exp $
 .\"
-.Dd $Mdocdate: June 5 2013 $
+.Dd $Mdocdate: November 30 2014 $
 .Dt LLDIV 3
 .Os
 .Sh NAME
@@ -63,4 +63,4 @@ and
 The
 .Fn lldiv
 function conforms to
-.St -ansiC-99 .
+.St -isoC-99 .

src/lib/libc/stdlib/strtod.3

@@ -29,9 +29,9 @@
 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 .\" SUCH DAMAGE.
 .\"
-.\"	$OpenBSD: strtod.3,v 1.19 2014/01/19 10:39:00 schwarze Exp $
+.\"	$OpenBSD: strtod.3,v 1.20 2014/11/30 21:21:59 schwarze Exp $
 .\"
-.Dd $Mdocdate: January 19 2014 $
+.Dd $Mdocdate: November 30 2014 $
 .Dt STRTOD 3
 .Os
 .Sh NAME
@@ -164,4 +164,4 @@ The
 and
 .Fn strtold
 functions conform to
-.St -ansiC-99 .
+.St -isoC-99 .

src/lib/libc/stdlib/strtol.3

@@ -29,9 +29,9 @@
 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 .\" SUCH DAMAGE.
 .\"
-.\"	$OpenBSD: strtol.3,v 1.25 2014/09/14 14:32:44 schwarze Exp $
+.\"	$OpenBSD: strtol.3,v 1.26 2014/11/30 21:21:59 schwarze Exp $
 .\"
-.Dd $Mdocdate: September 14 2014 $
+.Dd $Mdocdate: November 30 2014 $
 .Dt STRTOL 3
 .Os
 .Sh NAME
@@ -256,7 +256,7 @@ The
 and
 .Fn strtoimax
 functions conform to
-.St -ansiC-99 .
+.St -isoC-99 .
 Setting
 .Va errno
 to

src/lib/libc/stdlib/strtoul.3

@@ -29,9 +29,9 @@
 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 .\" SUCH DAMAGE.
 .\"
-.\"	$OpenBSD: strtoul.3,v 1.23 2014/09/14 14:32:44 schwarze Exp $
+.\"	$OpenBSD: strtoul.3,v 1.24 2014/11/30 21:21:59 schwarze Exp $
 .\"
-.Dd $Mdocdate: September 14 2014 $
+.Dd $Mdocdate: November 30 2014 $
 .Dt STRTOUL 3
 .Os
 .Sh NAME
@@ -243,7 +243,7 @@ The
 and
 .Fn strtoumax
 functions conform to
-.St -ansiC-99 .
+.St -isoC-99 .
 Setting
 .Va errno
 to

src/lib/libc/string/strerror.3

@@ -29,9 +29,9 @@
 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 .\" SUCH DAMAGE.
 .\"
-.\"	$OpenBSD: strerror.3,v 1.13 2014/04/07 17:57:56 schwarze Exp $
+.\"	$OpenBSD: strerror.3,v 1.14 2014/11/30 21:21:59 schwarze Exp $
 .\"
-.Dd $Mdocdate: April 7 2014 $
+.Dd $Mdocdate: November 30 2014 $
 .Dt STRERROR 3
 .Os
 .Sh NAME
@@ -107,7 +107,7 @@ The message will be truncated to fit.
 The
 .Fn strerror
 function conforms to
-.St -ansiC-99 .
+.St -isoC-99 .
 The
 .Fn strerror_r
 function conforms to