Adding transport=udp to sample sip.conf - Also changes version of Asterisk 1.8 in UPGRADE

(issue ASTERISK-19352)
Reported by: jamicque
Patches:
	asterisk-19352-transport-warning-message-v1.patch uploaded by Michael L. Young (license 5026)
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Merged revisions 357490 from http://svn.asterisk.org/svn/asterisk/branches/1.8
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Merged revisions 357497 from http://svn.asterisk.org/svn/asterisk/branches/10


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@357503 65c4cc65-6c06-0410-ace0-fbb531ad65f3