Moreover, unlike "list sets", "list maps" only supported "list maps" and
"list maps inet", without the ability to only list maps of a given table.
Compact this to unify the syntax so it becomes possible to omit the "table"
keyword for either reset or list mode.
flowtables, secmarks and synproxys keywords are updated too. "flow table"
and "meters" are NOT changed since both of these are deprecated in favor
of standard nft sets.