Clean a few more things

Use the new botan 1.11.32 Tls::Client API (but stay compatible with older ones)

TLS: Enable ecc point compression

If available in Botan.

There is an issue where, if botan supports it but we don’t enable it, then
the TLS handshake may fail with some servers

Do not fail to build if litesql is not there

move is_connecting outside of an ifdef

Remove some useless virtual method from SocketHandler

fix an “unused parameter” warning

Fix an error on gcc 4.9, because it is so stupid it can’t find operator""s

e2e tests that the IRC server received an ident response

Trivial include cleanup

Remove an unused variable

Fix some little compilation errors with some configs, from last commit

Support the ident protocol

fix #3211

Add missing cstring include for strerror

Move all the connect() logic from TCPSocketHandler into a subclass

This way, TCPSocketHandler only deal with the message sending/receiving, not
the connect() or anything else.  This will be used for implementing servers
(because when a client is accepted, we don’t need all the connect() and dns
resolution stuff).

Update the doc to say that we support xep 0059

Start version 5.0

Release version 4.0

Little update to the changelog

Remove a never reached (and non-sensical) error