[Bug 888504] [NEW] Lightning won't connect to CALDAV server which doesn't support RFC 5746

[Rob Lesslie]

Public bug reported:

When attempting to connect to https://caldav.icloud.com/ to access my
CALDAV calendar using the lightning extension, the affected calendars in
the calendar list are greyed out.  When they are enabled (right click on
calendar -> Properties -> tick "Switch this calendar on") an error
appears in the error console and the calendar does not load.  It then
returns to being greyed out.

The error message is:
caldav.icloud.com : server does not support RFC 5746, see CVE-2009-3555

Upon investigation and reading the Mozilla Wiki entry on Security:Renegotiation (https://wiki.mozilla.org/Security:Renegotiation)  the following config items should allow this behaviour to be overridden:
security.ssl.renego_unrestricted_hosts
security.ssl.allow_unrestricted_renego_everywhere__temporarily_available_pref

I therefore set security.ssl.renego_unrestricted_hosts to contain the
string caldav.icloud.com and set
security.ssl.allow_unrestricted_renego_everywhere__temporarily_available_pref
to true.  However, they have no effect.

Description:	Ubuntu 11.10
Release:	11.10

thunderbird:
  Installed: 7.0.1+build1+nobinonly-0ubuntu1
  Candidate: 7.0.1+build1+nobinonly-0ubuntu1
  Version table:
 *** 7.0.1+build1+nobinonly-0ubuntu1 0
        500 http://gb.archive.ubuntu.com/ubuntu/ oneiric/main amd64 Packages
        100 /var/lib/dpkg/status

xul-ext-lightning:
  Installed: 1.0~b7+build1-0ubuntu1
  Candidate: 1.0~b7+build1-0ubuntu1
  Version table:
 *** 1.0~b7+build1-0ubuntu1 0
        500 http://gb.archive.ubuntu.com/ubuntu/ oneiric/universe amd64 Packages
        100 /var/lib/dpkg/status

** Affects: thunderbird
     Importance: Undecided
         Status: New

** Affects: lightning-extension (Ubuntu)
     Importance: Undecided
         Status: New

** Also affects: thunderbird
   Importance: Undecided
       Status: New

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Title:
  Lightning won't connect to CALDAV server which doesn't support RFC
  5746

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