Modify SQL update script to accept NULL fields for users
The value NULL in the qid/ssid/tid fields of the user table means that the
value from the associated domain record should be used instead.
This patch modifies the PL/pgSQL functions used by Dovecot and Postfix
accordingly.
# All parameters are described in pgsql_table(5) / PGSQL PARAMETERS
#
# The hosts that Postfix will try to connect to and query from.
hosts = localhost
# The user name and password to log into the pgsql server.
user = postfix
password = some_password
# The database name on the servers.
dbname = mailsys
# The SQL query template used to search the database
query = SELECT gid FROM postfix_gid WHERE domainname='%s'