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,