chan_sip: Clarify 'Forcerport' Setting Displayed When Running "sip show peers"

While looking at ASTERISK-22236, Walter Doekes pointed out that when running
"sip show peers", the setting being displayed can be confusing.  The display of
"N" used to mean NAT (i.e. yes).  The NAT setting has gone through many
different changes resulting in the display of different characters to try and
convey what the current setting is for 'Forcerport' (A for Auto and Forcerport
is currently on, a for Auto but Forcerport is off, Y for yes, and N for no).
During the initial code review to try and clarify these settings (especially
since "N" no longer meant what it used to mean in prior versions of Asterisk),
Mark Michelson suggested using the full space available to display the settings
which helped to make the settings very clear.  That was a great suggestion.

Therefore, this patch does the following:

* The column for 'Forcerport' now will show: Auto (Yes), Auto (No), Yes, or No.

* A column for the 'Comedia' setting has been added.  It too will display the
  setting in a non-cryptic way: Auto (Yes), Auto (No), Yes, or No.

* UPGRADE.txt has been updated to document this change.

(closes issue ASTERISK-22728)
Reported by: Walter Doekes
Tested by: Michael L. Young
Patches:
    asterisk-forcerport-display-clarification_v3.diff
                                     uploaded by Michael L. Young (license 5026)

Review: https://reviewboard.asterisk.org/r/2941
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Merged revisions 402111 from http://svn.asterisk.org/svn/asterisk/branches/11
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Merged revisions 402112 from http://svn.asterisk.org/svn/asterisk/branches/12


git-svn-id: http://svn.asterisk.org/svn/asterisk/trunk@402113 f38db490-d61c-443f-a65b-d21fe96a405b
Fix UPGRADE.txt Due To Merging From Branch 11

When merging in the patch for ASTERISK-22728, the UPGRADE.txt file was changed
incorrectly.  That change should have gone into ASTERISK-11.txt.

This commit is to fix that.

Also, another comment in the UPGRADE-11.txt was missing and this commit adds
that as well.
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Merged revisions 402115 from http://svn.asterisk.org/svn/asterisk/branches/12


git-svn-id: http://svn.asterisk.org/svn/asterisk/trunk@402117 f38db490-d61c-443f-a65b-d21fe96a405b
Put back several merge revisions that were lost in r401962

git-svn-id: http://svn.asterisk.org/svn/asterisk/trunk@402128 f38db490-d61c-443f-a65b-d21fe96a405b
Put back several merge revisions that were lost in r402054

git-svn-id: http://svn.asterisk.org/svn/asterisk/trunk@402129 f38db490-d61c-443f-a65b-d21fe96a405b