Bug#973697: thunderbird: missing libresolv.so breaks OpenPGP key search by email

[Jordan Glover]

There is upstream fix that should work for all debian editions[1]. See also 
upstream ticket at[2]

[1] https://bug1634053.bmoattachments.org/attachment.cgi?id=9191200
[2] https://bugzilla.mozilla.org/show_bug.cgi?id=1634053

Jordan