Remove bogus reference to SSH key signing
Add example signing scripts from pkg-repo(8)
Init iterator with NULL.

It is required to set an iterator object to NULL before calling to
ucl_iterate_object.
Fix erroring out when no revoked certs are found
Fix missing cert due to pkg-repo creating .pub file, not .cert
Use proper EPKG_OK/FATAL for return
We are signing with SHA256 RSA, not SHA1
Fix inverted logic, no good signature = failure
New Release 1.2.0.b2
Update sqlite to 3.8.1
Sync from libucl