Fixed notify/enotify extension handling
Fix possibly wrong error message when contact with the same email exists on move/copy
Fix error when spell-checking an empty text (#1489831)
Avoid popupmenus being closed when scrollbar is clicked (#1489832)
Update changelog
Remove usage of $RCMAIL global variable
Add config variable 'proxy_whitelist'

HTTP headers X_FORWARDED_* and X_REAL_IP are only evaluated when
received from an IP listed in proxy_whitelist. Furthermore, only the
last non-trusted IP from X-Forwarded-For is used in place of the real
ip.

Without this, an attacker can easily spoof the headers and control the
result of the ip or ssl check.

This fixes several problems with [3a4c9f42], [4d480b36] and [a520f331] as
mentioned in #1489729.

Conflicts:
	CHANGELOG
Fix typo in comment
Accept broken vcards from Outlook that only supply ORG but not the required N or FN properties
Make sure mbstring susbtitute character is set to empty string in rcube_charset::clean()
Fix identities_level=4 handling in new_user_dialog plugin (#1489840)
Add splitter in Settings > Responses