are now writable. Warning: writing-back a modified header (with put_msg_header)
could fail if you lengthen header fields (strings).

Update indentation/brace style.
Display CVS revision in version banner, no copyright.

Used by Smeg@

did not work if the second argument was a string variable.

ASCII value of a number happened to match the crc32 of a variable name,
the code wouldn't run correctly. isvar() and newvar() are updated.

CHDIR/CHANGE_DIR.

All stock src files are now decompiled correctly!  Hooray!