[6.0] 812ede3eb Add a SLT_Notice VSL tag

[Reza Naghibi]

commit 812ede3eb1ec2a69fecce54ac2330563605e0619
Author: Martin Blix Grydeland <martin at varnish-software.com>
Date:   Mon Nov 25 11:41:26 2019 +0100

    Add a SLT_Notice VSL tag
    
    This VSL tag will be used for informational messages related to
    exceptional handling of requests.
    
    Conflicts:
        doc/sphinx/reference/vsl.rst

diff --git a/include/tbl/vsl_tags.h b/include/tbl/vsl_tags.h
index a99fe9fcf..81f759608 100644
--- a/include/tbl/vsl_tags.h
+++ b/include/tbl/vsl_tags.h
@@ -661,6 +661,13 @@ SLTM(VCL_use, 0, "VCL in use",
 	"\n"
 )
 
+SLTM(Notice, 0, "Informational messages about request handling",
+	"Informational log messages on events occured during request"
+	" handling. Lines are prefixed with either [core] or [<VMOD name>]."
+	" See the NOTICE MESSAGES section below or the individual VMOD manual"
+	" pages for detailed information of notice messages.\n"
+)
+
 #undef NOSUP_NOTICE
 #undef NODEF_NOTICE
 #undef SLTM