horde/Horde_Util can optionally use package "horde/Horde_Imap_Client" (version >= 1.0.0, version <= 2.0.0, excluded versions: 2.0.0)
horde/Horde_Util can optionally use PHP extension "ctype"
horde/Horde_Util can optionally use PHP extension "filter"
horde/Horde_Util can optionally use PHP extension "mbstring"
