xbps-rindex(1) has a -r option that sets the remove mode,
due to the changes added to sign repodata we need to access
to the correct directory where repository public keys are
stored. This makes the code use `$PWD/keys` before falling
back to `metadir`.
Fixes the test suite to run with unprivileged users (non root).
Those are a wrapper around xbps_{array,dictionary}_internalize_from_zfile()
that prints a debugging msg when the plist file cannot be internalized.
Update xbps to use these wrappers.
Rather than using a random buffer from stack or heap, and decide
what size to use, create a private memory mapped object...
This simplifies the code in lib/verifysig.c and xbps-create.
