[cups.development] [RFE] STR #1275: Improve mimeFilter() performance

[jlovell.apple]

[STR New]

The attached patch provides a significant performance boost to mimeFilter()
by avoiding a mutual recursion loop down to MAX_FILTERS for almost every
type checked. The trick is to create a stack based list of the current
solution which is checked to make sure a new destination type isn't
already used as a source type.

Thanks!

Link: http://www.cups.org/str.php?L1275
Version: 1.2-feature