[0.15] [Harkonnen] Controls are reset when starting in headless mode

[mickael9]

If you start a factorio in headless mode, it will nuke the [controls] section of the config.ini file.

This can easilly be reproduced:

• Start Factorio normally. Change some controls. Exit.
• Run the same Factorio binary in headless mode (eg factorio --create /tmp/dummy or factorio --start-server /tmp/dummy)
• Restart Factorio normally. All the controls are back to their default

Curiously, only [controls] section is nuked and other client-specific sections are kept ([sound], [graphics], ...) and the result is the same with a headless-only build.

[Harkonnen]

Thanks for report. Fixed for coming release.