Add a clean command to handle generated headers (Closes: #696189)
add the check for clean for the first variant check.
Wrap the sanity checks to avoid uninitialised variable. Omit misleading messages during clean. Add more clean targets to allow repeated builds to work.
add link to the Debian package information
Update debian/rules patch for clean target support
Document the clean target support and add notes about the outstanding install operations.
add clean command to usage information
add clean command to manpage usage information.
add clean command to manpage
prepare upload