pkg-convert: Add locking. EXCLUSIVE by default, READONLY with -n
pkg-convert: Add locking. EXCLUSIVE by default, READONLY with -n

khorben/pkg,khorben/pkg,Open343/pkg,Open343/pkg,junovitch/pkg,en90/pkg,en90/pkg,skoef/pkg,skoef/pkg,khorben/pkg,junovitch/pkg