This commit fixes and improves MsgCFTypes maximum payload length.
The counter of FilterType in MsgCFTypes is varInt which for 256
FilterType it has 3 bytes size.
This adds standard wire tests for MsgCFTypes. Things done in these
commit:
- Add standard wire test for MsgCFTypes
- Fix a potential bug at BtcEncode: return an error if the number
of filter types exceed the maximum number of supported filter
types (256)
- Add an extended error checking for checking malformed encoded
data return correct errors.
