Set version to 1.4.1. Changed mail address to

Set version to 1.4.1.  Changed mail address to
alex@gnu.org.  Mention the mailin listg sql.el@gnu.org.
(sql-input-ring-separator): Doc fix.
(sql-mode-syntax-table): double-dash starts comments is defined as
". 56" instead of ". 12b" for XEmacs.
(sql-stop, sql-interactive-mode): Doc fixes.
(sql-postgres): Queries for database and server, not just one.
(sql-set-sqli-buffer): sql-set-sqli-hook must be quoted.