Mimic ipset
C code for determining correct default ipset revision for hash:ip{port,net,etc}
#1031
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Fixes #1030
It takes both desired features AND set type into account when determining the "correct" default revision, which is how it actually works in the
ipset
userspace binary.e.g.
hash:ip,port,net
comment
support? Revision 5.counter
support? Revision 4.etc etc.
A more exhaustive mapping would be ideal, but this PR only does default revision mappings for the ipset types that previously had revision defaulting logic, and not all possible ipset types globally.