Re-connect to postgresql when the connection is lost

fix #3336

Reflect message IDs in channel MUCs

fix #3283

Use a transaction around the DELETE + INSERT of the after_connection_commands

Otherwise we can imagine that two clients changing this value at the same
time would mix things up.

ref #3275

Allow the execution of multiple commands after the IRC connection

fix #3275

Revert "Use std::optional<bool> instead of OptionalBool"

This reverts commit ba879a882e031d7b8503f78fe41d1210000c96ca.

Revert "Use if constexpr to make things a lot more readable"

This reverts commit d62ca9f87906be6f046fe9d07afb8bfb69c166e3.

Use if constexpr to make things a lot more readable

Use std::optional<bool> instead of OptionalBool

Rename a few “hostname” into “address”, regarding last commit

ref #3273

Allow to override the addresses used to connect to an IRC network

fix #3273

Fix the INSERT query for types that don’t have any Id column

Actually display the error message from postgresql when a query failed

Log the warn/error messages coming from libpq in a correct format

Sort archive messages by date (and only then by id)

fix #3337

Because apparently the IDs are not always incrementing. We still use them to
know the order of two messages that were received at the same second (in
this case, the ID will always be incrementing).

Fix the actual_bind versions for integrals

Fix a memory leak when psql connection fails

Support the <before/> element in MAM requests

Use the same function for both history orders

Fix a few warnings

Send a item-not-found error when the “after” value is not in the archive