802.1Q DB functions return affected ports count

add8021QPort: return 1 or 0
del8021QPort: idem
upd8021QPort: idem
replace8021QPorts: use upd8021QPort return value
exec8021QDeploy: idem
saveDownlinksReverb: idem
resolve8021QConflicts: idem
update8021QPortList: idem