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

Merge branch 'postgresql' into 'master'

Add postgresql support

Closes #3237

See merge request louiz/biboumi!18

Add postgresql support

Add an index for the muc_log_line table

This immensely speeds up the archive select queries.

fix #3292