Prefix libguestfs-inspect functions with guestfs_inspect_.

The functions are also made non-static.
This is in preparation to moving the header function implementations to a .c file.

guestfs-inspect.c

@@ -16,7 +16,7 @@ int main(int argc, char **argv) {
     return EXIT_SUCCESS;
   }
 
-  char *ep = endpoint();
+  char *ep = guestfs_inspect_endpoint();
   zsock_t *daemon = zsock_new_req(ep);
   free(ep);
 
@@ -40,7 +40,7 @@ int main(int argc, char **argv) {
     break;
   }
 
-  zmsg_t *msg = command_to_zmsg(command);
+  zmsg_t *msg = guestfs_inspect_command_to_zmsg(command);
   zmsg_send(&msg, daemon);
   zmsg_t *rep = zmsg_recv(daemon);
 
@@ -62,7 +62,7 @@ int main(int argc, char **argv) {
   zmsg_destroy(&msg);
   zmsg_destroy(&rep);
   zsock_destroy(&daemon);
-  command_destroy(&command);
+  guestfs_inspect_command_destroy(&command);
 
   return EXIT_SUCCESS;
 }