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/vim9instr.pro b/src/proto/vim9instr.pro
index 52a7c79..535673c 100644
--- a/src/proto/vim9instr.pro
+++ b/src/proto/vim9instr.pro
@@ -54,6 +54,7 @@
int generate_STRINGMEMBER(cctx_T *cctx, char_u *name, size_t len);
int generate_ECHO(cctx_T *cctx, int with_white, int count);
int generate_MULT_EXPR(cctx_T *cctx, isntype_T isn_type, int count);
+int generate_SOURCE(cctx_T *cctx, int sid);
int generate_PUT(cctx_T *cctx, int regname, linenr_T lnum);
int generate_EXEC_copy(cctx_T *cctx, isntype_T isntype, char_u *line);
int generate_EXEC(cctx_T *cctx, isntype_T isntype, char_u *str);