use full path to binary in (commented) relaydb example,

from jared rr spiegel, closes PR 4982, ok beck@

src/etc/spamd.conf

@@ -1,4 +1,4 @@
-# $OpenBSD: spamd.conf,v 1.16 2005/08/29 15:52:45 millert Exp $
+# $OpenBSD: spamd.conf,v 1.17 2006/02/01 20:22:43 dhartmei Exp $
 #
 # spamd config file, read by spamd-setup(8) for spamd(8)
 #
@@ -70,12 +70,12 @@ korea:\
 #	:black:\
 #	:msg="SPAM. Your address %A is in my relaydb list.":\
 #	:method=exec:\
-#	:file=relaydb -4lb:
+#	:file=/usr/local/bin/relaydb -4lb:
 
 #relaydb-white:\
 #	:white:\
 #	:method=exec:\
-#	:file=relaydb -4lw:
+#	:file=/usr/local/bin/relaydb -4lw:
 
 # Whitelists are done like this, and must be added to "all" after each
 # blacklist from which you want the addresses in the whitelist removed.