rc: Add os-release URL rc.conf variables

Add rc.conf defaults for the os-release URL settings introduced in the
os-release rc.d script. This makes it easier for downstream integrators
and appliances to override the URLs via rc.conf instead of patching the
script.

The following variables are added to libexec/rc/rc.conf:
- osrelease_home_url
- osrelease_documentation_url
- osrelease_support_url
- osrelease_bug_report_url

These correspond to HOME_URL, DOCUMENTATION_URL, SUPPORT_URL, and
BUG_REPORT_URL in the generated os-release file.

Signed-off-by: NVSRahul <nvsrahul@hotmail.com>
Reviewed by: imp
Pull Request: https://github.com/freebsd/freebsd-src/pull/1961

libexec/rc/rc.conf

@@ -705,6 +705,10 @@ harvest_mask="4607"	# Entropy device harvests all but the very invasive sources.
 osrelease_enable="YES"	# Update /var/run/os-release on boot (or NO).
 osrelease_file="/var/run/os-release" # File to update for os-release.
 osrelease_perms="444"	# Default permission for os-release file.
+osrelease_home_url="https://FreeBSD.org"	# HOME_URL in /var/run/os-release.
+osrelease_documentation_url="https://docs.FreeBSD.org"	# DOCUMENTATION_URL in /var/run/os-release.
+osrelease_support_url="https://www.FreeBSD.org/support"	# SUPPORT_URL in /var/run/os-release.
+osrelease_bug_report_url="https://bugs.FreeBSD.org"	# BUG_REPORT_URL in /var/run/os-release.
 dmesg_enable="YES"	# Save dmesg(8) to /var/run/dmesg.boot
 dmesg_umask="022"	# Default umask for /var/run/dmesg.boot file.
 watchdogd_enable="NO"	# Start the software watchdog daemon

libexec/rc/rc.d/os-release

@@ -8,17 +8,20 @@
 
 . /etc/rc.subr
 
+name="osrelease"
+desc="os-release update"
+rcvar="osrelease_enable"
+start_cmd="osrelease_start"
+stop_cmd=":"
+
+load_rc_config $name
+
 : ${osrelease_file:=/var/run/os-release}
 : ${osrelease_perms:=444}
 : ${osrelease_home_url:="https://www.FreeBSD.org"}
 : ${osrelease_documentation_url:="https://docs.FreeBSD.org"}
 : ${osrelease_support_url:="https://www.FreeBSD.org/support"}
 : ${osrelease_bug_report_url:="https://bugs.FreeBSD.org"}
-name="osrelease"
-desc="Update ${osrelease_file}"
-rcvar="osrelease_enable"
-start_cmd="osrelease_start"
-stop_cmd=":"
 
 osrelease_start()
 {
@@ -46,8 +49,6 @@ __EOF__
 	startmsg 'done.'
 }
 
-load_rc_config $name
-
 # doesn't make sense to run in a svcj: config setting
 osrelease_svcj="NO"