create-directory* returns #t if the directory already exists
Auto-normalizing directory paths in tar-create to have a / suffix.
Adding assoc-get-list analog of conf-get-list.
Making assoc-get[-list] permissively ignore of non-pair entries.
Updating conf-specialize with the new record type.
Adding uri-has-scheme? utility.
Reversing logic of uri-has-scheme?.
Handling streams separately in file-position since fseek doesn't
return the same value as lseek.  Fixes issue #220.
Fixing possible overflow in random bignums.
Fixes issue #222.
Using bytevectors for random state.
Disabling test broken on Linux.
Resetting port offset when seeking on an fd-backed port.