Merged from trunk 6622:6625

   Merged from trunk 6622:6625

   +------------------------------------------------------------------------+
   | 6623    | For bug #179766, expand USE_EXPAND variables inside the USE  |
   | zmedico | incremental loop so that USE"-*" will not always destroy     |
   |         | them.                                                        |
   |---------+--------------------------------------------------------------|
   | 6625    | Call tcgetattr and tcsetattr on the slave end of the pty in  |
   | zmedico | order to avoid an "invalid argument" error on Solaris.       |
   |         | Thanks to grobian.                                           |
   +------------------------------------------------------------------------+

svn path=/main/branches/prefix/; revision=6626