[master] da3c0bd9d Clarify this is a 3-fields tag

[Federico G. Schwindt]

commit da3c0bd9d767da265b077e0b65b2b82ac9aa1dfa
Author: Federico G. Schwindt <fgsch at lodoss.net>
Date:   Mon Jan 14 15:55:31 2019 +0000

    Clarify this is a 3-fields tag

diff --git a/include/tbl/vsl_tags.h b/include/tbl/vsl_tags.h
index cc02f18d4..8353bd966 100644
--- a/include/tbl/vsl_tags.h
+++ b/include/tbl/vsl_tags.h
@@ -645,10 +645,12 @@ SLTM(SessError, 0, "Client connection accept failed",
 SLTM(VCL_use, 0, "VCL in use",
 	"Records the name of the VCL being used.\n\n"
 	"The format is::\n\n"
-	"\t%s [via %s]\n"
-	"\t|       |\n"
-	"\t|       +- Name of label used to find it (optional)\n"
+	"\t%s [ %s %s ]\n"
+	"\t|    |  |\n"
+	"\t|    |  +- Name of label used to find it\n"
+	"\t|    +---- \"via\"\n"
 	"\t+--------- Name of VCL put in use\n"
+	"\n"
 )
 
 #undef NODEF_NOTICE