server: Move code to libpatchew

Signed-off-by: Fam Zheng <famz@redhat.com>
message: Invalid char tolerant in message body

Signed-off-by: Fam Zheng <famz@redhat.com>
testing: Rewrite testing API

Added signature verification.

Add "warnings" in passed tests

Signed-off-by: Fam Zheng <famz@redhat.com>
ui: Remve manual testing input page

Signed-off-by: Fam Zheng <famz@redhat.com>