Removed strcasecmp and strncasecmp because they are non-standand C functions. (#858)

ports/linux/bacport.h

@@ -36,10 +36,6 @@
 #include <poll.h> /* for convenience */
 #endif
 
-#ifdef HAVE_STRINGS_H
-#include <strings.h> /* for convenience */
-#endif
-
 /* Three headers are normally needed for socket/file ioctl's:
  * <sys/ioctl.h>, <sys/filio.h>, and <sys/sockio.h>.
  */

ports/linux/bip6.c

@@ -109,7 +109,7 @@ void bip6_set_interface(char *ifname)
                 stdout, "BIP6: found interface: %s\n", ifa_tmp->ifa_name);
         }
         if ((ifa_tmp->ifa_addr) && (ifa_tmp->ifa_addr->sa_family == AF_INET6) &&
-            (strcasecmp(ifa_tmp->ifa_name, ifname) == 0)) {
+            (bacnet_stricmp(ifa_tmp->ifa_name, ifname) == 0)) {
             sin = (struct sockaddr_in6 *)ifa_tmp->ifa_addr;
             bvlc6_address_set(
                 &BIP6_Addr, ntohs(sin->sin6_addr.s6_addr16[0]),