Additionally check socket file with S_ISSOCK

This fixes bug https://bugzilla.redhat.com/show_bug.cgi?id=1870201

gethost.c

@@ -202,14 +202,14 @@ struct addrlist *get_address_info (
 	    strncpy(path, fulldpyname, sizeof(path));
 	    path[sizeof(path) - 1] = '\0';
 #endif
-	    if (0 == stat(path, &sbuf)) {
+	    if (0 == stat(path, &sbuf) && S_ISSOCK(sbuf.st_mode) ) {
 		is_path_to_socket = 1;
 	    } else {
 		char *dot = strrchr(path, '.');
 		if (dot) {
 		    *dot = '\0';
 		    /* screen = atoi(dot + 1); */
-		    if (0 == stat(path, &sbuf)) {
+		    if (0 == stat(path, &sbuf) && S_ISSOCK(sbuf.st_mode)) {
 		        is_path_to_socket = 1;
 		    }
 		}