TLSProtocolMin 3.0 not accepted in 2.4.18

A dotted number is not accepted for TLSProtocolMin, e.g.,
TLSProtocolMin 3.0

However, it seems is should be, hence below is a patch: when looking
for a number, make sure that not just the first character is a
digit, but the entire string can be parsed as such.

Note: IMHO this might not be the right fix, but "it works". The
right fix might be to check for ARG_INT before trying to parse it
as an integer. But that's too much of a change and I'm not that
familiar with the code.

Index: bconfig.c
===================================================================
retrieving revision 1.3
diff -u -r1.3 bconfig.c
--- bconfig.c	5 Oct 2009 16:22:10 -0000	1.3
+++ bconfig.c	7 Oct 2009 21:45:28 -0000
@@ -3626,13 +3626,8 @@
 	}
 	ch_free( c->value_string );
 	c->cleanup = config_tls_cleanup;
-	if ( isdigit( (unsigned char)c->argv[1][0] ) ) {
-		if ( lutil_atoi( &i, c->argv[1] ) != 0 ) {
-			Debug(LDAP_DEBUG_ANY, "%s: "
-				"unable to parse %s \"%s\"\n",
-				c->log, c->argv[0], c->argv[1] );
-			return 1;
-		}
+	if ( isdigit( (unsigned char)c->argv[1][0] ) &&
+	     lutil_atoi( &i, c->argv[1] ) == 0 ) {
 		return(ldap_pvt_tls_set_option(slap_tls_ld, flag, &i));
 	} else {
 		return(ldap_int_tls_config(slap_tls_ld, flag, c->argv[1]));