Missing fields in a data-form response are now interpreted as an empty value

Allow the execution of multiple commands after the IRC connection

fix #3275

Fix a few warnings

Merge branch 'postgresql' into 'master'

Add postgresql support

Closes #3237

See merge request louiz/biboumi!18

Add postgresql support

Fix cstdint -> cstddef, to fix compilation on freebsd

Merge branch 'orm' into 'master'

Pure c++ sqlite3 ORM

Closes #3271

See merge request !11

Add default values for the database columns

Implement our own database ORM, and update the whole code to use it

Entirely replace LiteSQL

fix #3271