Add new exchangetimezone 'Amsterdam, Berlin, Bern, Rom, Stockholm, Wien'

[chr-is]

Add new timezone in lib/timezonedata/exchangezones.php:

'Amsterdam, Berlin, Bern, Rom, Stockholm, Wien' => 'Europe/Berlin',

Example ICS-File:

BEGIN:VCALENDAR
METHOD:PUBLISH
PRODID:Microsoft Exchange Server 2010
VERSION:2.0
X-WR-CALNAME:***
BEGIN:VTIMEZONE
TZID:(UTC+01:00) Amsterdam, Berlin, Bern, Rom, Stockholm, Wien
BEGIN:STANDARD
DTSTART:16010101T030000
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
RRULE:FREQ=YEARLY;INTERVAL=1;BYDAY=-1SU;BYMONTH=10
END:STANDARD
BEGIN:DAYLIGHT
DTSTART:16010101T020000
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
RRULE:FREQ=YEARLY;INTERVAL=1;BYDAY=-1SU;BYMONTH=3
END:DAYLIGHT
END:VTIMEZONE
BEGIN:VEVENT
.....

[codecov]

Codecov Report

Merging #618 (e5371c8) into master (198196c) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##             master     #618   +/-   ##
=========================================
  Coverage     98.76%   98.76%           
  Complexity     1865     1865           
=========================================
  Files            71       71           
  Lines          5325     5326    +1     
=========================================
+ Hits           5259     5260    +1     
  Misses           66       66           

Impacted Files	Coverage Δ
lib/timezonedata/exchangezones.php	100.00% <100.00%> (ø)

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