Moderate squirrelmail security update

[1.4.8-2.1]

• remove banners

[1.4.8-2]

• more Japanese filename fixes (#195639)

[1.4.8-1]

• 1.4.8 release with CVE-2006-4019 and upstream bug fixes

[1.4.7-5]

• More JP translation updates (#194598)

[1.4.7-4]

• Fix fatal typo in config_local.php (#198306)

[1.4.7-2]

• Move sqspell_config.php to /etc and mark it %config(noreplace) (#192236)

[1.4.7-1]

• 1.4.7 with CVE-2006-3174
• Reduce patch for body text (#194457)
• Better JP translation for Check mail (#196117)