patch 8.1.1367: can set 'modelineexpr' in modeline

Problem:    can set 'modelineexpr' in modeline.
Solution:   Add P_SECURE flag.
diff --git a/src/option.c b/src/option.c
index 8e62efc..39ef052 100644
--- a/src/option.c
+++ b/src/option.c
@@ -1889,7 +1889,7 @@
     {"modeline",    "ml",   P_BOOL|P_VIM,
 			    (char_u *)&p_ml, PV_ML,
 			    {(char_u *)FALSE, (char_u *)TRUE} SCTX_INIT},
-    {"modelineexpr", "mle",  P_BOOL|P_VI_DEF,
+    {"modelineexpr", "mle",  P_BOOL|P_VI_DEF|P_SECURE,
 			    (char_u *)&p_mle, PV_NONE,
 			    {(char_u *)FALSE, (char_u *)0L} SCTX_INIT},
     {"modelines",   "mls",  P_NUM|P_VI_DEF,
diff --git a/src/testdir/test_modeline.vim b/src/testdir/test_modeline.vim
index c33a080..c3c624d 100644
--- a/src/testdir/test_modeline.vim
+++ b/src/testdir/test_modeline.vim
@@ -119,6 +119,7 @@
   call s:modeline_fails('makespellmem', 'makespellmem=Something()', 'E520:')
   call s:modeline_fails('mzschemedll', 'mzschemedll=Something()', 'E520:')
   call s:modeline_fails('mzschemegcdll', 'mzschemegcdll=Something()', 'E520:')
+  call s:modeline_fails('modelineexpr', 'modelineexpr', 'E520:')
   call s:modeline_fails('omnifunc', 'omnifunc=Something()', 'E520:')
   call s:modeline_fails('operatorfunc', 'operatorfunc=Something()', 'E520:')
   call s:modeline_fails('perldll', 'perldll=Something()', 'E520:')
diff --git a/src/version.c b/src/version.c
index bcc9aef..7c548bd 100644
--- a/src/version.c
+++ b/src/version.c
@@ -768,6 +768,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1367,
+/**/
     1366,
 /**/
     1365,