man.el fails with csh (Re: Patch: Re: man.el should avoid "sh")

[Masakazu HIGAKI]

Man.el has been fixed on 2 May but this fix may not work correctly
when csh is used as default shell or emacs is invoked from csh.
The fix makes man.el use a shell defined by shell-file-name variable
to invoke external commands in Man-filter-list
but a csh-like shell cannot accept the command lines specified
in Man-filter-list.

So, please consider:
- introducing a routine to choose a sh-like shell instead of csh-like shells
or
- changing Man-filter-list so that csh-like shells accept

Thank you.

----
 Masakazu Higaki