Crash with certain path conditions.

[BillyBooBob]

ProxyPass /wak http://127.0.0.1:9090/ ProxyPassReverse / http://127.0.0.1:9090/

Using URL http://localhost/wak works fine, but when using URL http://localhost/wak/ it draws an EXC_BAD_ACCESS. Traced through with debugger and it happens in TFRegEx.m at

• (BOOL)matchesString:(NSString*)string { return (regexec(&expression,[string UTF8String],0,NULL,0)==0); }

Noticed also that string = nil when this happens.