Bug#941217: asterisk: pjsip show contacts displays double entries for each contact

[Bernhard Schmidt]

Control: tags -1 fixed-upstream
Control: forwarded -1 https://issues.asterisk.org/jira/browse/ASTERISK-28228

> The normal behavior is to show each contact once, as the Asterisk
> Development Team has already corrected in version 16.6.0-rc2 (res_pjsip:
> fix more contacts of the same contact in "pjsip show contacts". -
> ASTERISK-28228)

Thanks. I don't think this warrants a backport, I'll upload 16.6.0 when
it is out.

Bernhard