utils.rfc6266: Initial implementation.
utils.rfc6266: Nicer ext-param handling
tests: Fix rfc6266 testcase.
utils.rfc6266: Remove unneeded IKeyword.
utils.rfc6266: Remove percent_decode function.
utils.rfc6266: Do parsing of ext-values earlier.
utils.rfc6266: Test for invalid ISO-8859-1 and duplicate params.
utils.rfc6266: Cleanup
utils.rfc6266: Fix lint
Adjust the rest of the code for rfc6266 -> pypeg2
doc: Add some more RFCs to HACKING
Add some logging for content-disposition