db: session: sanitize comparator and filter policy in options
db: session: sanitize comparator and filter policy in options

trigrass2/goleveldb,no2key/goleveldb,FactomProject/goleveldb,zzl0/goleveldb,syndtr/goleveldb,chai2010/goleveldb,ngaut/goleveldb,rentongzhang/goleveldb,conseweb/goleveldb,hustbill/goleveldb,btcsuite/goleveldb