patch 8.0.0764: 'termkey' does not work yet
Problem: 'termkey' does not work yet.
Solution: Implement 'termkey'.
diff --git a/src/proto/option.pro b/src/proto/option.pro
index 8c9bde5..59dcd42 100644
--- a/src/proto/option.pro
+++ b/src/proto/option.pro
@@ -9,6 +9,7 @@
void init_gui_options(void);
void set_title_defaults(void);
int do_set(char_u *arg, int opt_flags);
+int string_to_key(char_u *arg, int multi_byte);
void set_options_bin(int oldval, int newval, int opt_flags);
int get_viminfo_parameter(int type);
char_u *find_viminfo_parameter(int type);