patch 8.2.4859: wget2 files are not recognized

Problem:    wget2 files are not recognized.
Solution:   Add patterns to recognize wget2. (Doug Kearns)

src/testdir/test_filetype.vim

@@ -592,6 +592,7 @@ let s:filename_checks = {
     \ 'wast': ['file.wast', 'file.wat'],
     \ 'webmacro': ['file.wm'],
     \ 'wget': ['.wgetrc', 'wgetrc'],
+    \ 'wget2': ['.wget2rc', 'wget2rc'],
     \ 'winbatch': ['file.wbt'],
     \ 'wml': ['file.wml'],
     \ 'wsh': ['file.wsf', 'file.wsc'],

src/version.c

@@ -746,6 +746,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    4859,
 /**/
     4858,
 /**/