It's getting a common pattern to call AsLower() or MakeLower() on
the arguments passed to WildCmp(), we might as well add this for
convenience. It's tempting to make it case-insensitive by default,
since pretty much any IRC related comparison should be, but that
could potentially break some existing code.
The enum is a bit more verbose, but leads to more readable code:
str.Equals("foo", true)
// vs.
str.Equals("foo", CString::CaseSensitive)
Deprecate the old Equals() and leave out the length parameter
from the new version => use StartsWith() or StrCmp() instead.
