boot: Add Documentation= lines to services

It's a neat way to point folks to the documentation (of course, better
would be to have man pages for each of those services). Also
consistently use Title Case everywhere.

Closes: #1750
Approved by: cgwalters

src/boot/ostree-finalize-staged.service

@@ -19,6 +19,7 @@
 # https://lists.freedesktop.org/archives/systemd-devel/2018-March/040557.html
 [Unit]
 Description=OSTree Finalize Staged Deployment
+Documentation=man:ostree(1)
 ConditionPathExists=/run/ostree-booted
 DefaultDependencies=no
 

src/boot/ostree-prepare-root.service

@@ -17,6 +17,7 @@
 
 [Unit]
 Description=OSTree Prepare OS/
+Documentation=man:ostree(1)
 DefaultDependencies=no
 ConditionKernelCommandLine=ostree
 ConditionPathExists=/etc/initrd-release

src/boot/ostree-remount.service

@@ -16,7 +16,8 @@
 # Boston, MA 02111-1307, USA.
 
 [Unit]
-Description=OSTree Remount OS/ bind mounts
+Description=OSTree Remount OS/ Bind Mounts
+Documentation=man:ostree(1)
 DefaultDependencies=no
 ConditionKernelCommandLine=ostree
 OnFailure=emergency.target