noted 'get-immediate' option, fixed obsolete references to 'filesync'
Implement sample "unregister-replace" command, which allows one
address to be replaced by another in the registry.

Add "user" to the supported actions for the default command.
This allows the address from the From: or Apparently-From: header
to be overridden.
improved notes about which Perl modules are required to install,
and where/how to get them
Add sanity checks for reminders:  if token_remind is unset,
negative, or greater than token_lifetime, do not send a reminder.
Tighten access to the "set" and "show" commands.  The new
"default user" feature makes it possible not only to assume
someone's identity, but also to see the result of commands
that are issued.  Add list_access_check to the "set" core
function, and change the default access for the "show"
command from "mismatch" to "confirm."
*** empty log message ***
Add "confirm2" access rule action.  This requires a request to
be confirmed by both the initiator and the beneficiary of a
majordomo request, if their addresses are different and no
password is supplied.  "confirm2" will be the default for the
"unregister" (perhaps "changeaddr" in future) command
until security issues have been reviewed.
Hook up DSN parsing and make sure mail to list-owner actually works.
Indicate in confirm and consult messages the address that was
responsible for the request.

Add "sessionuser" variable to a Majordomo object, indicating the
address that was used to initiate a session.

  $fh = new IO::File ">$file" || die "Eek!";
does not work as expected.  Use "or" instead of ||.

Add "posing" variable to access rules; it indicates if the
user for the current request is different from the original
"sessionuser."  The "posing" variable has side-effects:  if the rule
for a request is "mismatch" and "posing" is true, both
the user and victim may be consulted.  "posing" is treated
the same as "mismatch" for (un)subscribe commands.

Change the set and show commands to use "mismatch" by
default for access checks.

Enhance "default user" command: send results of each
command to the posed address.  The poser will still
see the result of the command (succeed, stall, fail)
but none of the output.  The message to the posee
has the poser's address in the From: header and
majordomo-owner in Reply-To.
greatly improved description in "help configset restrict_post",
minor improvement to index and text of "help admin"
greatly improved description in "help configset restrict_post",
minor improvement to index and text of "help admin"
Move address change code from "unregister-replace" to the new
"changeaddr" core routine.  The changeaddr command adjusts
aliases automatically, as does the unregister command, but
it does not yet deal with auxiliary lists.
for safety, add error traps on chmod and chown calls
added help file for new changeaddr command, added mention
of the new command in several other help files
added help file for new changeaddr command
Remove postinstall.pl, as it isn't used anywhere.
improved explanation of changeaddr based on input from Yount
documented new confirm2 option for access_rules,  based on input from Yount
Use the second file specified for conf_cons or confirm2 only for
notices that a token exists, not for replies after the token
is accepted or rejected.
(_str_to_clock) Allow saturday and sunday to be used in the digest
"times" field.