List of global variables on class/macro characters for happy local hacking

_V_CHAR		macro: CF version [version]
_MX_CHAR	macro: using MX sendmail [general]
_FA_CHAR	macro: from address [address]
_LU_CHAR	class: local users [address]
_AA_CHAR	class: accept addresses [acceptaddr]
_FD_CHAR	class: fake domains
_SA_CHAR	pair: special domain name/users [specialfrom]
_IR_CHAR	macro: indirect relay host name [indirect]
_DD_CHAR	class: domain names for direct delivery [indirect]
_SD_CHAR	macro: secondary domain name [secondary]
_SU_CHAR	class: secondary users [secondary]
_UR_CHAR	macro: uucp relay host name [uucp]
_NG_CHAR	class: uucp neigbors [uucp]
_ND_CHAR	class: uucp neigbor domains [uucp]
_SH_CHAR	macro: spool host name [spool]
_AU_CHAR	class: aliased users [spool.v1]
_HH_CHAR	macro: hub host name [hub]
_RU_CHAR	class: remote users [hub]
_NR_CHAR	class: non remote users [hub]
_BR_CHAR	macro: bitnet relay host name [bitnet]
_DR_CHAR	macro: decnet relay host name [decnet]
_KD_CHAR	class: known top domains [canon]
_UD_CHAR	class: domain names for usertable [usertable]
