[Dovecot] $IP not getting set?

[A.L.]

    Using dovecot 2.0.13.  I went to implement relay-ctrl per directions
on the Wiki, and failed.  After running it down, as best as I can
determine, the problem is that the $IP variable is not getting set (and
thus not re-set in the script wrapper).   I plunked a "set >> debug"
into the script, and the only env var's that are set are as listed below
(slightly sanitized for public display).   Anyone have any ideas?  I
have tried both the Wiki-way, and this way:
http://dovecot.org/list/dovecot/2009-December/045139.html  with
identical results.

CLIENT_LIMIT='1000'
CONFIG_FILE='/my_path/config'
DOVECOT_CHILD_PROCESS='1'
DOVECOT_PRESERVE_ENVS='TZ'
DOVECOT_VERSION='2.0.13'
GENERATION='7690'
IFS='
'
LOG_SERVICE='1'
OPTIND='1'
PATH='my_path'
PPID='1'
PS1='# '
PS2='> '
PS4='+ '
PWD='my_pwd'
SOCKET_COUNT='1'
SSL_SOCKET_COUNT='0'