Removed: Courier from Jessie packages list (See https://release.debian.org/migration/testing.pl?package=courier)

    [feedquote='i-MSCP Github (nuxwin)','https://github.com/i-MSCP/imscp/commit/c97e86bd3dbb7c0f8e9236871733b0414d22bdb3']

    Code
    1. Removed: Courier from Jessie packages list (See https://release.debian.org/migration/testing.pl?package=courier)

    [/feedquote]