+ install -d $prefix/lib/thunderbird-$ver/defaults/isp/US
+ install mailnews/base/ispdata/movemail.rdf \
+ mail/extensions/newsblog/rss.rdf \
+ $prefix/lib/thunderbird-$ver/defaults/isp &&
+ ln -sfv ../{movemail,rss}.rdf \
+ $prefix/lib/thunderbird-$ver/defaults/isp/US