Add wish list item for converting configuration-related environment variables to ./configure options.
Add wish list item for converting configuration-related environment
variables to ./configure options.

svn path=/trunk/; revision=5271

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