Fix a small documentation merge issue
ASTERISK-18862
git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/1.8@345829
65c4cc65-6c06-0410-ace0-
fbb531ad65f3
SIP Changes
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* Due to potential username discovery vulnerabilities, the 'nat' setting in sip.conf
- now defaults to yes. It is very important that phones requiring nat=no be
+ now defaults to force_rport. It is very important that phones requiring nat=no be
specifically set as such instead of relying on the default setting. If at all
possible, all devices should have nat settings configured in the general section as
opposed to configuring nat per-device.