Obsolete dired-x's directory local variables in favor of standard ones.
* lisp/dired.el (dired-mode): Call hack-dir-local-variables-non-file-buffer. * lisp/dired-x.el (dired-omit-mode): Safe if boolean. (dired-enable-local-variables): Fix doc and custom type. Mark risky. (dired-enable-local-variables, dired-local-variables-file) (dired-hack-local-variables): Make obsolete. (dired-omit-here-always): Use dir-locals.el instead. * doc/misc/dired-x.texi (Features): Don't advertise obsolete local variables. Simplify layout. (Omitting Variables): Update local variables example. (Local Variables): Say this is obsolete. Fix description of dired-enable-local-variables possible values. * etc/NEWS: Relocate the existing entry about directory local variables in file-les buffers, and make it clearer. Mention above dired changes.
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