Require files to be of a minimum size in the RRDP & RSYNC transports

Picked 100 bytes as a minimum, to accommodate future signature schemes
(such as the smaller P-256) and small files like empty CRL

Require files to be of a minimum size in the RRDP & RSYNC transports

Picked 100 bytes as a minimum, to accommodate future signature schemes
(such as the smaller P-256) and small files like empty CRLs.

With and OK claudio@ tb@

show more ...

Move some functions from rrdp.c to rrdp_util.c and hex_decode to encoding.c.
This will make it easier to write a RRDP regress test.
OK job@ deraadt@