module: Write documentation in doc/ on how to write a module

Write a small file in doc/HACKING/ on how to proceed with a module. The current template is the freshly merged dirauth module.

This would be for now mostly related to the build system and the code standards.

changed milestone to %Tor: 0.3.4.x-final in legacy/trac

added 034-roadmap-subtask in Legacy / Trac component::core tor/tor in Legacy / Trac documentation in Legacy / Trac milestone::Tor: 0.3.4.x-final in Legacy / Trac modularization in Legacy / Trac owner::dgoulet in Legacy / Trac parent::25494 in Legacy / Trac priority::medium in Legacy / Trac resolution::implemented in Legacy / Trac reviewer::ahf in Legacy / Trac severity::normal in Legacy / Trac status::closed in Legacy / Trac type::task in Legacy / Trac labels

Trac:
Status: new to accepted
Owner: N/A to dgoulet

Branch: ticket25991_034_01

Watch for typos and bad syntax! I'm an expert at that :P. Fixup commits are very welcome in this case :).

Trac:
Reviewer: N/A to ahf
Status: accepted to needs_review

Got a patch from ahf, I pushed his fixes.

ahf is having Internet issues but told me "ack" on this one. Going in merge_ready. He'll double confirm when he is back online but in the meantime, we are good.

Trac:
Status: needs_review to merge_ready

merged!

Trac:
Resolution: N/A to implemented
Status: merge_ready to closed

closed

moved from legacy/trac#25991 (moved)

added Task label and removed 1 deleted label

added 1 deleted label and removed 1 deleted label

added Documentation label and removed 1 deleted label

added Technical Debt label and removed 1 deleted label