emacs-w3m disallows safe ISO-8859-1 characters in bookmarks

["Clemens Fischer" <ino-qc@xxxxxxxxxxxxxxxxxxxxxx>]

Dear Bug Team!

please go to http://www.golen.de/ and try to bookmark the page.
every other page with ISO-8859-1 (8-bit) characters in the title will
not bookmark, because emacs-w3m thinks they are unsafe.

================================================================

System Info to help track down your bug:
---------------------------------------
emacs-w3m-version
 => "1.3.144"
emacs-version
 => "GNU Emacs 21.3.50.1 (i386-unknown-freebsd4.6.2, X toolkit, Xaw3d scroll bars)\n of 2003-01-09 on spotteswoode.dnsalias.org"
mule-version
 => "5.0 (SAKAKI)"
system-type
 => berkeley-unix
w3m-version
 => "w3m/0.4rc3"
w3m-type
 => w3m
w3m-compile-options
 => ("lang=en" "image" "color" "mouse" "sysmouse" "menu" "cookie" "ssl" "ssl-verify" "external-uri-loader" "w3mmailer" "nntp" "gopher" "mark")
w3m-language
 => nil
w3m-command-arguments
 => nil
w3m-command-arguments-alist
 => nil
w3m-command-environment
 => nil
w3m-use-mule-ucs
 => nil