process-util: add pidref-based version of wait_for_terminate_and_check()

src/basic/process-util.h

@@ -75,7 +75,9 @@ typedef enum WaitFlags {
         WAIT_LOG = WAIT_LOG_ABNORMAL|WAIT_LOG_NON_ZERO_EXIT_STATUS,
 } WaitFlags;
 
+int pidref_wait_for_terminate_and_check(const char *name, PidRef *pidref, WaitFlags flags);
 int wait_for_terminate_and_check(const char *name, pid_t pid, WaitFlags flags);
+
 int wait_for_terminate_with_timeout(pid_t pid, usec_t timeout);
 
 void sigkill_wait(pid_t pid);