use collection list in ShowRequestor box
expose verison words to do a more strict version check in rt-setup-database
Remove unimplemented user override of DefaultSummaryRows

479a311 added DefaultSummaryRows to the lsit of user-overridable
options, but failed to change any of the calls to
->Get('DefaultSummaryRows') to respect the user's setting.  Remove the
value from the list of user-configurable settings, as it would merely
serve as a default for the per-user preference already found on the
/Prefs/MyRT.html page.  Having a per-user configurable default setting
for a per-user configurable preference makes no sense.
don't not escape in BuildFormatString

it's not necessary and would cause double-escape bug(#17002)
validate user name on both "create" and "update"

see also #18722
save lengthy call into a variable
don't use split for addresses, use parser
turn blacklist into a hash with reasons

* to make log clearer about why we blacklist recipients
* make sure we use case insensitive email comparision
explain in logs why email is in blacklist
Make messages more verbose and actionable
Remove the trailing newline from the msgid before logging using it
Refactor RemoveInappropriateRecipients to use a callback interface

This allows other subclasses to add their own particular cases for why
an address should be skipped, by overriding
RemoveInappropriateRecipients to call an additional RecipientFilter.
Use RecipientFilter to provide a log message when NotifyActor kicks in
Rewrite test to use terser RT::Test::Email mail_ok method
Ensure that no warnings are generated during the tests
Add a test to ensure that RTAddressRegexps are always squelched, even when CC'd
just call AddCustomField value

We do report that "something" was already the current value for
other fields (eg. Status), so I don't see reason to handle it
specially for custom fields.
Remove CreateUserCalled; last callsite removed in RT 1.3

729b9f9 was the commit that removed the last use of CreateUserCalled.
Remove QueueRightsForUser; last callsite removed in RT 1.3

2ce24cf was the commit that removed the last use of QueueRightsForUser.
Remove SelectLinkType; last callsite removed in RT 1.3

a6d7fc6 was the commit that removed the last use of SelectLinkType.