detect-tls-sni: add link to documentation

src/detect-tls-sni.c

@@ -63,6 +63,7 @@ void DetectTlsSniRegister(void)
 {
     sigmatch_table[DETECT_AL_TLS_SNI].name = "tls_sni";
     sigmatch_table[DETECT_AL_TLS_SNI].desc = "content modifier to match specifically and only on the TLS SNI buffer";
+    sigmatch_table[DETECT_AL_TLS_SNI].url = DOC_URL DOC_VERSION "/rules/tls-keywords.html#tls-sni";
     sigmatch_table[DETECT_AL_TLS_SNI].Match = NULL;
     sigmatch_table[DETECT_AL_TLS_SNI].AppLayerMatch = NULL;
     sigmatch_table[DETECT_AL_TLS_SNI].Setup = DetectTlsSniSetup;