Reverting undesired debugging change.
Indentation.
Use an alias for M4_PROCEDURE to keep certain similarity between the pg and the mysql versions of the stored procedures.
Use the information_schema whenever possible.

Checking user existence by using the user_privileges table instead of mysql.user.
Set the silent mode for db_filter only, not for mymysql, so we can use it more comfortably in interactive mode.
Use no-auto-rehash and batch mode in mysql client for faster startup.
Exit if SQL processing fails, to avoid further processing which will probably fail too.
04-tables.sql: Added autoincrements and corrected a couple of types.
Make the file start header follow the comment format for better dumps.
Unsigned was missing for request persona_id foreign key.
A more useful prompt for our mysql clients.
Typo.
Finished basic CHARP stored procedures and functions for mysql, with a couple of details missing, but mostly done.