Wrong parsing of pcre and possibly others

[vpiserchia]

I've just found a possible problems in the options parsing function find_opt_end

For example when in a quoted options (like the PCRE ones, but also others ) it is possible to find a semicolon char and break the parsing.

To explain, the following returns a wrong option list:

pcre:"/[^\x15][^I?>(i/.7*)+96][ -\',-013-68;-=@-GJ-MOP-_`hk-op-tv-\x7f]{1,14}\x15/R";