add an example rc(8) script for openbsd

copy it to `/etc/rc.d`, write your config in `/etc/gmid.conf` and launch
using `rcctl enable gmid && rcctl start gmid`.

.gitignore

@@ -1,6 +1,7 @@
 *.pem
 TAGS
 gmid
+!contrib/gmid
 gg
 *.o
 compat/*.o

contrib/README

@@ -14,3 +14,6 @@ vim
 	Syntax highlighting of gmid configuration for vim, to be
 	placed into ~/.vim/ or /usr/share/vim/vimfiles.
 
+gmid
+
+    Sample rc(8) script for gmid for OpenBSD.

contrib/gmid

@@ -0,0 +1,14 @@
+#!/bin/ksh
+#
+
+daemon="/usr/local/bin/gmid"
+daemon_flags="-c /etc/gmid.conf"
+
+. /etc/rc.d/rc.subr
+
+rc_pre() {
+	# use rcexec here since daemon_flags may contain arguments with spaces
+	${rcexec} "${daemon} -n ${daemon_flags}"
+}
+
+rc_cmd $1