chore(release): Bump version to v0.5.1

feat(proc-cmdline): Add proc-cmdline unit

coreos-cloudinit.go

@@ -11,7 +11,7 @@ import (
 	"github.com/coreos/coreos-cloudinit/system"
 )
 
-const version = "0.5.0"
+const version = "0.5.1"
 
 func main() {
 	var printVersion bool

units/user-cloudinit-proc-cmdline.service

@@ -0,0 +1,12 @@
+[Unit]
+Description=Load cloud-config from url defined in /proc/cmdline
+Requires=coreos-setup-environment.service
+After=coreos-setup-environment.service
+Before=user-config.target
+ConditionKernelCommandLine=cloud-config-url
+
+[Service]
+Type=oneshot
+RemainAfterExit=yes
+EnvironmentFile=-/etc/environment
+ExecStart=/usr/bin/coreos-cloudinit --from-proc-cmdline

units/user-config.target

@@ -6,3 +6,6 @@ After=system-config.target
 # Load user_data placed by coreos-install
 Requires=user-cloudinit@var-lib-coreos\x2dinstall-user_data.service
 After=user-cloudinit@var-lib-coreos\x2dinstall-user_data.service
+
+Requires=user-cloudinit-proc-cmdline.service
+After=user-cloudinit-proc-cmdline.service