Allow utils to handle escaped regexes and a wider range of expressions.
When converting from AppArmor regexes to Python regexes, checks are
made to skip normally significant characters that are preceded by
regexes. Additionally, ^ and $ are also backslash escaped when
converting expressions from logs to AppArmor regexes. This should make
it possible to handle expressions such as the following (which would
previously cause a crash):
/usr/lib/firefox{,-[0-9]*}/firefox{,*[^s][^h]}
An additional question: Should the documentation be updated to mention that escape characters are accepted in AAREs, now?
Edited by buzzingwires