Use substitution for timezone specs and ids

[macosforgebot]

douglm@… originally submitted this as ticket:372

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Allows us to keep them up to date or change them as desired. For example - added to serverinfo.xml

        <substitution>
            <key>$tzspecUSE:</key>
            <value>BEGIN:VTIMEZONE
TZID:US/Eastern
LAST-MODIFIED:20040110T032845Z
BEGIN:STANDARD
DTSTART:20001026T020000
RRULE:FREQ=YEARLY;BYDAY=-1SU;BYMONTH=10
TZNAME:EST
TZOFFSETFROM:-0400
TZOFFSETTO:-0500
END:STANDARD
BEGIN:DAYLIGHT
DTSTART:20000404T020000
RRULE:FREQ=YEARLY;BYDAY=1SU;BYMONTH=4
TZNAME:EDT
TZOFFSETFROM:-0500
TZOFFSETTO:-0400
END:DAYLIGHT
END:VTIMEZONE
             </value>
        </substitution>

        <substitution>
            <key>$tzidUSE:</key>
            <value>US/Eastern</value>
        </substitution>

And changed CalDAVTester/Resource/CalDAV/implicit/deletecalendar/8.ics to be

BEGIN:VCALENDAR
VERSION:2.0
CALSCALE:GREGORIAN
PRODID:-//CALENDARSERVER.ORG//NONSGML Version 1//EN
$tzspecUSE:
BEGIN:VEVENT
UID:[email protected]
DTSTART;TZID=$tzidUSE::20060101T120000
...

[macosforgebot]

douglm@… originally submitted this as comment:1:⁠ticket:372

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Slightly incorrect - tzspec def should have ended

END:VTIMEZONE</value>

[macosforgebot]

@wsanchez originally submitted this as comment:2:⁠ticket:372

• Radar deleted
• Milestone set to CalendarServer-3.x

[macosforgebot]

@wsanchez originally submitted this as comment:3:⁠ticket:372

• Priority changed from 5: Not set to 4: Nice to have

[macosforgebot]

@wsanchez originally submitted this as comment:4:⁠ticket:372

• Milestone changed from CalendarServer-3.x to Later