directory-sep-char obsolete

[Adrian Lanz]

Compiling tramp (CVS version) under Gnus Emacs (CVS version) I get
warnings saying that the varibale directory-sep-char is obsolete
since Emacs 21.1. The comment string of this variable says:

 This variable is obsolete since 21.1;
 do not use it.

 Directory separator character for built-in functions that return file names.
 The value is always ?/.  Don't use this variable, just use `/'.

Here the output of the compile:

emacs --no-site-file -batch --eval "(add-to-list 'load-path \".\")"  -f 
batch-byte-compile  tramp.el

In toplevel form:
tramp.el:142:41:Warning: reference to free variable unused-vars

In tramp-handle-file-truename:
tramp.el:2027:33:Warning: directory-sep-char is an obsolete variable since
    21.1; do not use it.

In tramp-handle-expand-file-name:
tramp.el:3280:16:Warning: directory-sep-char is an obsolete variable since
    21.1; do not use it.

In tramp-handle-find-backup-file-name:
tramp.el:3569:16:Warning: reference to free variable
    tramp-backup-directory-alist

In tramp-touch:
tramp.el:4631:50:Warning: `error' called with 1 args to fill 0 format field(s)

In tramp-check-ls-commands:
tramp.el:4871:10:Warning: directory-sep-char is an obsolete variable since
    21.1; do not use it.

In tramp-bug:
tramp.el:6897:11:Warning: reference to free variable
    ,tramp-backup-directory-alist
tramp.el:6899:11:Warning: reference to free variable
    ,tramp-bkup-backup-directory-info
tramp.el:6913:11:Warning: reference to free variable ,backup-directory-alist
tramp.el:6915:11:Warning: reference to free variable
    ,bkup-backup-directory-info

In end of data:
tramp.el:7064:1:Warning: the function `tramp-save-PC-expand-many-files' might
    not be defined at runtime.
tramp.el:7064:1:Warning: the function `warnings' is not known to be defined.
Wrote /scratch/home/lanz/programs/cvs-downloads/tramp/tramp/lisp/tramp.elc

Thanks, Adrian.