[core] reset SIGUSR1 to SIG_DFL before execve()
reset SIGUSR1 to SIG_DFL in fdevent_fork_execve() before execve()
(in case SIGUSR1 had been set to SIG_IGN for server.max-worker > 0)
@@ -447,6 +447,7 @@ pid_t fdevent_fork_execve(const char *name, char *argv[], char *envp[], int fdin
signal(SIGTSTP, SIG_DFL);
#endif
signal(SIGPIPE, SIG_DFL);
+ signal(SIGUSR1, SIG_DFL);
execve(name, argv, envp ? envp : environ);
