Merged from trunk 11038:11040

   Merged from trunk 11038:11040

   | 11039   | * Since can_poll_pty() is unsafe due to he possibility of    |
   | zmedico | the poll() call blocking forever, replace it with a simpler  |
   |         | test on /dev/null that's derived from a test in a glib2      |
   |         | configure script. * Remove PtyReaderTestCase since it has    |
   |         | the same problem as can_poll_pty().                          |

   | 11040   | Remove all traces of the "poll" parameter for the            |
   | zmedico | PollScheduler constructor since it was only used by          |
   |         | can_poll_pty().                                              |

svn path=/main/branches/prefix/; revision=11041