Regeneration of gamelist for pc/*.conf files does not find cached entries when pc/*.conf filecontent is edited

[Gemba]

Describe the bug
Scraping info is dangling/orphaned in cache/db.xml when editing pc/*.conf files and updating from cache only (Skyscraper -p pc).

To Reproduce

1. Create a *.conf file in platform pc/ for a well known PC game (i.e., one which has scraping info in the online databases)
2. Scrape as usual from the different scraping sources with Skyscraper (with -s ...). gamelist gets created as expected with scraping data for that game
3. Change the content of the *.conf file
4. Run Skyscraper from cache to generate gamelist again (without -s)
5. Identified: Information of the game relating to the created *.conf file does not show up in generated gamelist.xml
6. Expected: gamelist.xml gets created with the game scraping info from cache.

Technical information

• Skyscraper version: 3.6.15
• OS: RetroPie 4.7.21 / Raspi OS Buster

Additional context
*.conf filecontent may be volatile until a proper config is found by the user and may be changed far more frequently than the *.conf filename itself.
I assume the effect comes from the fact that the .conf extension is not listed in this codesegment:
https://github.com/muldjord/skyscraper/blob/master/src/nametools.cpp#L494