fix correctMysqlUsers() function for new pdo-class, also created new wrapper for dbms-specific queries to possibly give the freedom to use anything else but MySQL (no promises so far)

Signed-off-by: Michael Kaufmann (d00p) <d00p@froxlor.org>
Merge remote-tracking branch 'origin/0.9.31'
return the generated user-/databasename after adding the database because it's needed

Signed-off-by: Michael Kaufmann (d00p) <d00p@froxlor.org>
Merge remote-tracking branch 'origin/0.9.31'
fix wiki urls in language files, thx to lando

Signed-off-by: Michael Kaufmann (d00p) <d00p@froxlor.org>
set long-lasting url for news-feed (and switch to inside.froxlor.org, which will be used more often in the future to provide up-to-date content in froxlor) and prefer connection via cURL to pass a custom-useragent for possible version depended news later

Signed-off-by: Michael Kaufmann (d00p) <d00p@froxlor.org>
Merge remote-tracking branch 'origin/0.9.31'