Use wordier file descriptions in --help
Use wordier file descriptions in --help

In #874 the translator was confused by these descriptions, because they
look the same as the file names. This commit changes the wording
somewhat to amend this. "Cache" is still a "cache", though; no idea how
to improve that one.

der-lyse/newsboat,newsboat/newsboat,newsboat/newsboat,der-lyse/newsboat,newsboat/newsboat,newsboat/newsboat,newsboat/newsboat,der-lyse/newsboat,der-lyse/newsboat,der-lyse/newsboat,der-lyse/newsboat,der-lyse/newsboat,newsboat/newsboat,der-lyse/newsboat,newsboat/newsboat,newsboat/newsboat