This helps to catch upgrade problems and simplifies some parts of the code.
Bumped XBPS_RELVER because xbps_remove_pkg() has been changed.
--HG--
extra : convert_revision : xtraeme%40gmail.com-20100128150850-gcs93su38t6moydn
if its hash doesn't match for the remove and purge targets respectively.
--HG--
extra : convert_revision : xtraeme%40gmail.com-20100125070948-841kw2r4knz2793e