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- Fix setting new encoding when switching networks
- Ignore ports when looking for network by hostname
- Only set UTF-8 when nothing explicitly set

Fixes #1628

Mentioned in #1624

Mostly for travis

The release tarballs will still have them

- Remove dead ones
- Use SASL and TLS when possible
- Make note of self-signed ones
- Add LibraIRC

Closes #1039
Closes #1512
Closes #1473

According to OpenSSL document
(https://www.openssl.org/docs/manmaster/ssl/SSL_get_verify_result.html),
when using SSL_get_verify_result(), the existence of certificate
needs to be checked. However, in current code, it does not.
Therefore, certificate existence check is required for correctly
handling the exception.

Closes #1549

- Properly use filesystem encoding
- Validate utf8 when loading (hopefully fixing crashes)
- Use Gio
- Handle Windows line endings
- Remove dead code
- Fix respecting max length of scrollback files

- AES and Blowfish mechanisms are deemed insecure and servers
  have removed support for them
- Remove attempts to retry since we only support one mech
- Handle SASL 3.2's new syntax for supported mechs

This is a pervasive problem that will likely show up in
other events also.

Closes #1460

Not the ideal solution..

Closes #1566

It could contain invalid chars or log to an arbitrary directory

This fixes the need to do pixel-perfect clicks to open links in chat

If you are talking with someone else with the same prefix as your
own nickname, and attempt to tab complete theirs. It will complete
your own nickname before theirs if you talked more recently. Since
people rarely intend to highlight themselves, this improves the
logic to complete your own name only as a last resort.

Fixes #1540

xtext keeps a static buffer and uses it for various things
and asserts that every text entry is < 4096. It does
this check on gtk_xtext_append*() except it does the check only on
the right half of text when indent is enabled.

This overflow caused corruption in the xtext struct
changing the url check functions making hovering
with the mouse do 'undefined' things.

In the long term this should be removed for a dynamically
allocated buffer so no arbitrary size limit exists and
text gets cut off.

Fixes #1465
Fixes #1186
Fixes #1206