minor addition to fontdoc.sty

[Vladimir Volovich]

Hello,

Please add the command \inputetx to fontdoc.sty in the next version of
fontinst. It might be like

\def\inputetx#1{%
   \edef\lowercase@file{\lowercase{%
     \edef\noexpand\lowercase@file{#1}}}%
   \lowercase@file
   \slot@number=0
   \input \lowercase@file.etx\relax
}

	Best regards, -- Vladimir.