patch 8.2.4650: "import autoload" only works with using 'runtimepath'
Problem: "import autoload" only works with using 'runtimepath'.
Solution: Also support a relative and absolute file name.
diff --git a/src/proto/scriptfile.pro b/src/proto/scriptfile.pro
index 510fb56..a38f258 100644
--- a/src/proto/scriptfile.pro
+++ b/src/proto/scriptfile.pro
@@ -6,6 +6,8 @@
estack_T *estack_pop(void);
char_u *estack_sfile(estack_arg_T which);
void ex_runtime(exarg_T *eap);
+int find_script_by_name(char_u *name);
+int get_new_scriptitem_for_fname(int *error, char_u *fname);
int do_in_path(char_u *path, char_u *name, int flags, void (*callback)(char_u *fname, void *ck), void *cookie);
int do_in_runtimepath(char_u *name, int flags, void (*callback)(char_u *fname, void *ck), void *cookie);
int source_runtime(char_u *name, int flags);