detect/file: add file.data, small cleanups

src/detect-file-data.c

@@ -80,7 +80,8 @@ int PrefilterMpmFiledataRegister(DetectEngineCtx *de_ctx,
  */
 void DetectFiledataRegister(void)
 {
-    sigmatch_table[DETECT_FILE_DATA].name = "file_data";
+    sigmatch_table[DETECT_FILE_DATA].name = "file.data";
+    sigmatch_table[DETECT_FILE_DATA].alias = "file_data";
     sigmatch_table[DETECT_FILE_DATA].desc = "make content keywords match on file data";
     sigmatch_table[DETECT_FILE_DATA].url = DOC_URL DOC_VERSION "/rules/http-keywords.html#file-data";
     sigmatch_table[DETECT_FILE_DATA].Setup = DetectFiledataSetup;

src/detect-fileext.c

@@ -71,6 +71,7 @@ void DetectFileextRegister(void)
     sigmatch_table[DETECT_FILEEXT].Free  = DetectFileextFree;
     sigmatch_table[DETECT_FILEEXT].RegisterTests = DetectFileextRegisterTests;
     sigmatch_table[DETECT_FILEEXT].flags = SIGMATCH_QUOTES_OPTIONAL|SIGMATCH_HANDLE_NEGATION;
+    sigmatch_table[DETECT_FILEEXT].alternative = DETECT_FILE_NAME;
 
     g_file_match_list_id = DetectBufferTypeRegister("files");
 

src/detect-filename.c

@@ -85,6 +85,7 @@ void DetectFilenameRegister(void)
     sigmatch_table[DETECT_FILENAME].Free  = DetectFilenameFree;
     sigmatch_table[DETECT_FILENAME].RegisterTests = DetectFilenameRegisterTests;
     sigmatch_table[DETECT_FILENAME].flags = SIGMATCH_QUOTES_OPTIONAL|SIGMATCH_HANDLE_NEGATION;
+    sigmatch_table[DETECT_FILENAME].alternative = DETECT_FILE_NAME;
 
     sigmatch_table[DETECT_FILE_NAME].name = "file.name";
     sigmatch_table[DETECT_FILE_NAME].desc = "sticky buffer to match on the file name";