[BSA-046] Security Update for icedove

Christoph Göhre uploaded new packages for icedove which fixed the following
security problems:

CVE-2011-0084

"regenrecht" discovered that incorrect pointer handling in the SVG
processing code could lead to the execution of arbitrary code.

CVE-2011-2378

"regenrecht" discovered that incorrect memory management in DOM
processing could lead to the execution of arbitrary code.

CVE-2011-2981

"moz_bug_r_a_4" discovered a Chrome privilege escalation
vulnerability in the event handler code.

CVE-2011-2982

Gary Kwong, Igor Bukanov, Nils and Bob Clary discovered memory
corruption bugs, which may lead to the execution of arbitrary code.

CVE-2011-2983

"shutdown" discovered an information leak in the handling of
RegExp.input.

CVE-2011-2984

"moz_bug_r_a4" discovered a Chrome privilege escalation vulnerability.

For the squeeze-backports distribution, this problem have been fixed in
version 3.1.12-1~bpo60+1.

For the testing distribution (wheezy), this problem has been fixed in
version 3.1.12-1.

For the unstable distribution (sid), this problem has been fixed in
version 3.1.12-1.