Configure and test modification for better Freebsd port

lib/src/clixon_plugin.c

@@ -509,7 +509,7 @@ rpc_callback_register(clicon_handle  h,
     		      char          *namespace,
 		      char          *name)
 {
-    rpc_callback_t *rc;
+    rpc_callback_t *rc = NULL;
 
     if (name == NULL || namespace == NULL){
 	clicon_err(OE_DB, EINVAL, "name or namespace NULL");

lib/src/clixon_yang_module.c

@@ -55,6 +55,7 @@
 #include <assert.h>
 #include <sys/stat.h>
 #include <netinet/in.h>
+#include <sys/param.h>
 
 /* cligen */
 #include <cligen/cligen.h>

lib/src/clixon_yang_type.c

@@ -78,6 +78,7 @@
 #include <assert.h>
 #include <regex.h>
 #include <netinet/in.h>
+#include <sys/param.h>
 
 /* cligen */
 #include <cligen/cligen.h>