* Memoise git config lookups (big speedup!)
* Switch to new production git repositories for reading.
(this can no longer divert to alioth).
+ * Remove obselete comment about DMs not being able to push.
Documentation:
* dgit(1): Remove some obsolete caveats from BUGS.
* dgit(1); Mention that -wgf can avoid need for build-deps.
+ * dgit(1): Reorganise and complete the configuration section.
Useability improvements:
* Provide -wdd aka --clean=dpkg-source-d. Closes:#792433.
* Remove configuration relating to alioth.
* Provide for different access mechanisms when pushing.
* Provide for configurable git url suffix.
+ * Allow git-url to be '' to force fallback to git-proto etc.
* Provide for checking git presence via http[s].
* Do some quoting on debug output (needed if the server might not
be trustworthy and might send us bad stuff).