- i_resp_previously, previously should include which tags ?
replay prevention all of them
- rpush negotiation for which tag to sign
- - big comment in dgit-repos-server (search for `we are updating only')
- - dgit-repos-server readupdates tag regexp
- test suite tests/lib
- many actual tests
- other tag should be [dgit Maintainer-Tag quilt=$quilt-mode]
+
+Want tests for
+ - accepting old and new version tags
+ - rejecting push of same version with one tag when then the other
+
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Provide --gpbpq[=:] options