* configure.in (CHECK_DTD): Doing things in The Right Way (TM) by   using AC_CACHE_CHECK.
* configure.in (CHECK_DTD): Doing things in The Right Way (TM) by
  using AC_CACHE_CHECK.

svn path=/trunk/; revision=2194

FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot,FreeScienceCommunity/PLPlot