Bjoern A. Zeeb dcdb4371ca Use inc_flags instead of the inc_isipv6 alias which so far
had been the only flag with random usage patterns.
Switch inc_flags to be used as a real bit field by using
INC_ISIPV6 with bitops to check for the 'isipv6' condition.

While here fix a place or two where in case of v4 inc_flags
were not properly initialized before.[1]

Found by:	rwatson during review [1]
Discussed with:	rwatson
Reviewed by:	rwatson
MFC after:	4 weeks
2008-12-17 12:52:34 +00:00
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