stage1/usr_from_coreos: add new image signing sub-key B58844F1
stage1/usr_from_coreos: add new image signing sub-key B58844F1

pub   4096R/93D2DCB4 2013-09-06
uid       [ unknown] CoreOS Buildbot (Offical Builds) <buildbot@coreos.com>
sub   4096R/74E7E361 2013-09-06 [expired: 2014-09-06]
sub   4096R/E5676EFC 2014-09-08 [expired: 2015-09-08]
sub   4096R/1CB5FA26 2015-08-31 [expires: 2017-08-30]
sub   4096R/B58844F1 2015-11-20 [expires: 2016-11-19]

rkt/rkt,mike1729/rkt,yifan-gu/rkt,matthaias/rkt,kinvolk/rkt,lucasallan/rkt,shobhit85/rkt,matthaias/rkt,jakon89/rkt,intelsdi-x/rkt,shobhit85/rkt,rkt/rkt,Wilybald/rkt,Wilybald/rkt,Shashwatsh/rkt,rkt/rkt,cab105/rkt,kinvolk/rkt,sgotti/rkt,coreos/rkt,yifan-gu/rkt,squeed/rkt,coreos/rkt,tmrts/rkt,dgonyeo/rkt,monstermunchkin/rkt,jonboulle/rkt,yifan-gu/rkt,jonboulle/rkt,lucasallan/rkt,ybubnov/rkt,jonboulle/rkt,lucasallan/rkt,squeed/rkt,sstabellini/rkt,monstermunchkin/rkt,intelsdi-x/rkt,yifan-gu/rocket,alban/rkt,s-urbaniak/rkt,markllama/rkt,cab105/rkt,euank/rkt,dgonyeo/rkt,jakon89/rkt,akshaykarle/rkt,Shashwatsh/rkt,kinvolk/rkt,tmrts/rkt,matthaias/rkt,yifan-gu/rocket,mike1729/rkt,joshix/rkt,jjlakis/rkt,jjlakis/rkt,Wilybald/rkt,dgonyeo/rkt,nhlfr/rkt,akshaykarle/rkt,rkt/rkt,cab105/rkt,kinvolk/rkt,euank/rkt,ybubnov/rkt,squeed/rkt,intelsdi-x/rkt,s-urbaniak/rkt,joshix/rkt,mike1729/rkt,alban/rkt,s-urbaniak/rkt,joshix/rkt,sstabellini/rkt,tmrts/rkt,jjlakis/rkt,ybubnov/rkt,monstermunchkin/rkt,yifan-gu/rocket,markllama/rkt,sstabellini/rkt,jakon89/rkt,achanda/rkt,achanda/rkt,coreos/rkt,achanda/rkt,Wilybald/rkt,shobhit85/rkt,Shashwatsh/rkt,joshix/rkt,nhlfr/rkt,alban/rkt,euank/rkt,akshaykarle/rkt,sgotti/rkt,markllama/rkt,nhlfr/rkt,lucasallan/rkt,sgotti/rkt