Make config defaults seteable by environment variables if setup is running headless
these are the environment variables and their defaults:
uname(&my_utsname);
/* set some sample/default values in place of blanks... */
CITADEL_c_nodename=my_utsname.nodename
CITADEL_c_humannode=_("My System")
CITADEL_c_phonenum=_("US 800 555 1212")
CITADEL_c_initax=4
CITADEL_c_moreprompt="<more>"
CITADEL_c_twitroom="Trashcan"
CITADEL_c_baseroom=BASEROOM
CITADEL_c_aideroom="Aide"
CITADEL_c_port_number=504
CITADEL_c_sleeping=900
CITADEL_c_smtp_port=25
CITADEL_c_pop3_port=110
CITADEL_c_imap_port=143
CITADEL_c_msa_port=587
CITADEL_c_smtps_port=465
CITADEL_c_pop3s_port=995
CITADEL_c_imaps_port=993
CITADEL_c_pftcpdict_port=-1
CITADEL_c_managesieve_port=2020
CITADEL_c_xmpp_c2s_port=5222
CITADEL_c_xmpp_s2s_port=5269