patch 8.0.1651: cannot filter :ls output for terminal buffers

Problem:    Cannot filter :ls output for terminal buffers.
Solution:   Add flags for terminal buffers. (Marcin Szamotulski, closes #2751)
diff --git a/src/buffer.c b/src/buffer.c
index 4b79840..0e13e1f 100644
--- a/src/buffer.c
+++ b/src/buffer.c
@@ -2930,18 +2930,34 @@
     int		i;
     int		ro_char;
     int		changed_char;
+#ifdef FEAT_TERMINAL
+    int		job_running;
+    int		job_none_open;
+#endif
 
     for (buf = firstbuf; buf != NULL && !got_int; buf = buf->b_next)
     {
+#ifdef FEAT_TERMINAL
+	job_running = term_job_running(buf->b_term);
+	job_none_open = job_running && term_none_open(buf->b_term);
+#endif
 	/* skip unlisted buffers, unless ! was used */
 	if ((!buf->b_p_bl && !eap->forceit && !vim_strchr(eap->arg, 'u'))
 		|| (vim_strchr(eap->arg, 'u') && buf->b_p_bl)
 		|| (vim_strchr(eap->arg, '+')
 			&& ((buf->b_flags & BF_READERR) || !bufIsChanged(buf)))
 		|| (vim_strchr(eap->arg, 'a')
-			 && (buf->b_ml.ml_mfp == NULL || buf->b_nwindows == 0))
+			&& (buf->b_ml.ml_mfp == NULL || buf->b_nwindows == 0))
 		|| (vim_strchr(eap->arg, 'h')
-			 && (buf->b_ml.ml_mfp == NULL || buf->b_nwindows != 0))
+			&& (buf->b_ml.ml_mfp == NULL || buf->b_nwindows != 0))
+#ifdef FEAT_TERMINAL
+		|| (vim_strchr(eap->arg, 'R')
+			&& (!job_running || (job_running && job_none_open)))
+		|| (vim_strchr(eap->arg, '?')
+			&& (!job_running || (job_running && !job_none_open)))
+		|| (vim_strchr(eap->arg, 'F')
+			&& (job_running || buf->b_term == NULL))
+#endif
 		|| (vim_strchr(eap->arg, '-') && buf->b_p_ma)
 		|| (vim_strchr(eap->arg, '=') && !buf->b_p_ro)
 		|| (vim_strchr(eap->arg, 'x') && !(buf->b_flags & BF_READERR))
diff --git a/src/testdir/test_terminal.vim b/src/testdir/test_terminal.vim
index 892da50..5e817de 100644
--- a/src/testdir/test_terminal.vim
+++ b/src/testdir/test_terminal.vim
@@ -45,11 +45,17 @@
   call assert_equal('t', mode())
   call assert_equal('yes', b:done)
   call assert_match('%aR[^\n]*running]', execute('ls'))
+  call assert_match('%aR[^\n]*running]', execute('ls R'))
+  call assert_notmatch('%[^\n]*running]', execute('ls F'))
+  call assert_notmatch('%[^\n]*running]', execute('ls ?'))
 
   call Stop_shell_in_terminal(buf)
   call term_wait(buf)
   call assert_equal('n', mode())
   call assert_match('%aF[^\n]*finished]', execute('ls'))
+  call assert_match('%aF[^\n]*finished]', execute('ls F'))
+  call assert_notmatch('%[^\n]*finished]', execute('ls R'))
+  call assert_notmatch('%[^\n]*finished]', execute('ls ?'))
 
   " closing window wipes out the terminal buffer a with finished job
   close
diff --git a/src/version.c b/src/version.c
index ae154b4..40746fe 100644
--- a/src/version.c
+++ b/src/version.c
@@ -763,6 +763,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1651,
+/**/
     1650,
 /**/
     1649,