Runtime log level increase/decrease command does not affect main process

In user1_signal_handler():

	if (!SIG_PARENT_PROCESS)
	{
		common_sigusr_handler(flags);
		return;
	}

common_sigusr_handler() should be called before if (...).

There is also no type string for the main process that we can pass to -R log_level_increase/decrease=<process type>, the only option is pid.