This patch adds more tests for the dovecot library, in particular:
- Protocol errors (invalid versions, etc.).
- Invalid command (cli-specific test).
- Connection breakups.
Many areas of the dovecot library are tested via chamuyero scripts, but
these were not being included in the coverage report.
This patch extends the dovecot-auth-cli tests so that they are now
coverage-aware.
This patch adds some tooling and scripts to generate test coverage
information.
Unfortunately, this involves some hacks as Go does not have support for
generating coverage-enabled binaries, or merging coverage reports; but
overall it's not very intrusive.
This patch adds a new package which implements two basic primitives for
authenticating against dovecot ("user exists", and "check password").
It is still experimental/work in progress.
