[FIX] varnish pexp doesn't match

Hi

I was not able to stop varnish on my machine and noticed that the pexp
didn't match. This my ps output:

_varnish 10665 1.2 4.2 24280 88380 ?? S 10:21PM 0:00.46 varnishd:
Varnish-Child -i xxxxx.home.ctors.net (varnishd)
_varnish 21965 0.0 0.1 1608 2240 ?? Ss 10:21PM 0:00.01 varnishd:
Varnish-Mgt -i xxxxx.home.ctors.net (varnishd)

So, here is a fix for it:

Index: www/varnish//pkg/varnishd.rc
===================================================================
RCS file: /cvs/ports/www/varnish/pkg/varnishd.rc,v
retrieving revision 1.4
diff -u -p -u -r1.4 varnishd.rc
--- www/varnish//pkg/varnishd.rc 11 Jan 2018 19:27:12 -0000 1.4
+++ www/varnish//pkg/varnishd.rc 3 Feb 2018 22:52:16 -0000
@@ -7,7 +7,7 @@ daemon_flags="-j unix,user=_varnish,ccgr

. /etc/rc.d/rc.subr

-pexp="varnishd: Varnish-Mgr $(hostname)"
+pexp="varnishd: Varnish-Mgt -i $(hostname)"
rc_reload=NO

rc_cmd $1