-c option not working for lxqt-session

[stefonarch]

I noticed that while testing a different config file under wayland, with
lxqt-session -c /home/stef/.config/lxqt-wayland/session.conf.

• lxqt-config-session writes to ~/.config/lxqt/session.conf
• lxqt-session process crashes because lock_screen_before_power_actions=false is true (default) even if none of the both config files have set "true" (see lxqt-session crashes when suspend/hibernate on wayland if "lock screen" is checked #457)

Expected Behavior

-c option works, write and read

Current Behavior

It doesn't

Steps to Reproduce (for bugs)

1. Use a different location, restart session
2. Change some setting and look at the timestamps or settings in both session.conf

Context

System Information

• Distribution & Version: arch, git

[tsujan]

Yes, there are three problems in the -c option:

1. The function SessionApplication::setConfigName() doesn't read its argument (such mistakes happen when a variable name is used for the argument name).
2. Even if the above-mentioned issue is fixed, the other parts of the code will ignore it. For example, the settings won't be written to the config file specified by the -c option.
3. The environment variable LXQT_SESSION_CONFIG set by that function will be seen by LXQt::PowerManager::PowerManager() as a config name, not a path.

[stefonarch]

We could just remove the -c option in `lxqt-session --help'.