Only add a trailing comma when appending to the end of the address list

See merge request !227

.gitattributes: add syntax highlight for meson.build in Web UI

See merge request !228

Signed-off-by: Konstantin Kharlamov <Hi-Angel@yandex.ru>

Since switching to the GNOME release schedule, we need to do unstable
releases off of mainline, which means we need to update the version
number (and drop the "-dev" suffix) so tarballs etc get the right
version.

Instead of looking for the -dev suffix, parse the version number
to determine if we should display the revision in About.

Fix deceptive warning

Closes #400

See merge request !225

Some improvements to conversation-list

See merge request !200

Make sure we match the whole link text as URL and not only some part. Add some symbols to be invalid in domains. Add 3 tests.

Markup generation requires lots of resources to walk through lists,
build strings, compare strings, etc.  And all of this gets done on every
draw of conversation-list widget for every conversation. Let's save up
some resources by caching the markup.
Signed-off-by: Konstantin Kharlamov <Hi-Angel@yandex.ru>

Signed-off-by: Konstantin Kharlamov <Hi-Angel@yandex.ru>

Signed-off-by: Konstantin Kharlamov <Hi-Angel@yandex.ru>

Signed-off-by: Konstantin Kharlamov <Hi-Angel@yandex.ru>

Fetching the value and comparing it to 0 should work just as fast as
directly assigning it. And since we don't really need to know here what
was the value of is_unread before, remove the comparison.
Signed-off-by: Konstantin Kharlamov <Hi-Angel@yandex.ru>

The first comment now mentions that entries are unique. This can be
exploited in further commits.

Second comment is misleading: the "if not present, add" part is clear
from code below, and the "in chronological order" is the misleading one:
chronological order is ensured by the first foreach, not by the second
foreach where the comment placed. And the first foreach already has a
commentary about the order.
Signed-off-by: Konstantin Kharlamov <Hi-Angel@yandex.ru>

Notification mails, such as github, gitlab, often gonna have the same
mail address, although participants are different. Fix the comparator to
take this situation into account.
Signed-off-by: Konstantin Kharlamov <Hi-Angel@yandex.ru>

Add a sub{module,project} for handy for those who don't have it

See merge request !226

Fixes #405

Fix SMTP forward path formatting

See merge request !223

This is explicilty disallowed by RFC 2074 §5 and not accepted by mail
servers.

See #336

Use string.get_next_char() to handle iterating over an
RFC822.MailboxAddress mailbox local part, and explicitly allow UTF-8
2, 3, and 4 byte chars without quoting, per RFC 5322.

This lets us fix the test cases that use UTF-8 chars in the local part.

Add simple SMTP integration test

See merge request !222

Both check for and throw Cancelled errors some more

See merge request !218

Fix application controller construction race

See merge request !219

Fix multiple controller instances being constructed if multiple actions
are executed at once.

Fixes some crashes when switching folders by keeping the down arrow
held down.