Instead of having to manually stub packages that should not be
downloaded we instead automatically stub all packages (except a small
list of whitelisted ones). Tests can re-introduce the real package by
using the `realPkgs` module argument.
* imapnotify: enable STARTTLS if enabled in email account config
Since version 2.3.10 goimapnotify supports starttls. In version 2.3.11 a
typo in the settings was fixed, using tlsOptions.starttls to enable it.
This commit enables starttls in the goimapnotify config file if it is
enabled in the email account's imap settings.
* imapnotify: test generated config file
Compare the generated service config file with a manually verified
sample.
