Catch a couple of places (one hidden inside an #if 0, other in solaris module) where retain_loopback needs to be opal_if_retain_loopback

This commit was SVN r23755.

opal/mca/if/posix_ipv4/if_posix.c

@@ -203,7 +203,7 @@ static int if_posix_open(void)
         }
 #endif
 #if 0
-        if (!retain_loopback && (ifr->ifr_flags & IFF_LOOPBACK) != 0) {
+        if (!opal_if_retain_loopback && (ifr->ifr_flags & IFF_LOOPBACK) != 0) {
             continue;
         }
 #endif

opal/mca/if/solaris_ipv6/if_solaris_ipv6.c

@@ -123,7 +123,7 @@ static int if_solaris_ipv6_open(void)
                Bug, FIXME: site-local, multicast, ... missing
                Check for 2000::/3?
             */
-            if ( (!retain_loopback && !IN6_IS_ADDR_LOOPBACK (&my_addr->sin6_addr)) &&
+            if ( (!opal_if_retain_loopback && !IN6_IS_ADDR_LOOPBACK (&my_addr->sin6_addr)) &&
                  (! IN6_IS_ADDR_LINKLOCAL (&my_addr->sin6_addr))) {
                 /* create interface for newly found address */
                 opal_if_t *intf;