patch 8.1.2364: termwinscroll test is flaky on FreeBSD

Problem:    Termwinscroll test is flaky on FreeBSD.
Solution:   Add to list of flaky tests.  Rename function.

src/testdir/runtest.vim

@@ -3,7 +3,7 @@
 " Errors are appended to the test.log file.
 "
 " To execute only specific test functions, add a second argument.  It will be
-" matched against the names of the Test_ funtion.  E.g.:
+" matched against the names of the Test_ function.  E.g.:
 "	../vim -u NONE -S runtest.vim test_channel.vim open_delay
 " The output can be found in the "messages" file.
 "
@@ -365,6 +365,7 @@ let s:flaky_tests = [
       \ 'Test_terminal_wall()',
       \ 'Test_terminal_wipe_buffer()',
       \ 'Test_terminal_wqall()',
+      \ 'Test_termwinscroll()',
       \ 'Test_timer_oneshot()',
       \ 'Test_timer_paused()',
       \ 'Test_timer_repeat_many()',

src/testdir/test_terminal.vim

@@ -1827,7 +1827,7 @@ func Test_terminal_out_err()
   call delete(outfile)
 endfunc
 
-func Test_terminwinscroll()
+func Test_termwinscroll()
   CheckUnix
 
   " Let the terminal output more than 'termwinscroll' lines, some at the start

src/version.c

@@ -737,6 +737,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    2364,
 /**/
     2363,
 /**/