plstrdup() tcl_cmd string instead of copying the pointer, and remove (disabled) status from help entry.
plstrdup() tcl_cmd string instead of copying the pointer, and remove
(disabled) status from help entry.

svn path=/trunk/; revision=4839

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