Disable HTTP fallback for SIP connection

Prevents from HTTP being used for SIP connection in case TLS or TCP fail.

Supported on: At least Windows 7

Registry Hive	HKEY_LOCAL_MACHINE
Registry Path	software\policies\microsoft\office\15.0\lync
Value Name	disablehttpconnect
Value Type	REG_DWORD
Enabled Value	1
Disabled Value	0

lync15.admx

Administrative Templates (Computers)

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Microsoft Visio 2013
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