Move plugin/{alloc,ipc,pid} to dmtcp/src/plugin.

git-svn-id: svn://svn.code.sf.net/p/dmtcp/code/trunk@2370 ba6dc0ae-232f-0410-883f-9ebac64fc565
Remove --enable-ptrace-support configure flag.

- Use --ptrace flag with dmtcp_launch to enable ptrace plugin.

git-svn-id: svn://svn.code.sf.net/p/dmtcp/code/trunk@2371 ba6dc0ae-232f-0410-883f-9ebac64fc565
Move contrib/modify-environ -> plugin/modify-env

git-svn-id: svn://svn.code.sf.net/p/dmtcp/code/trunk@2372 ba6dc0ae-232f-0410-883f-9ebac64fc565
Move contrib/rm -> plugin/batch-queue

git-svn-id: svn://svn.code.sf.net/p/dmtcp/code/trunk@2373 ba6dc0ae-232f-0410-883f-9ebac64fc565
Always generate contrib/*/Makefile.

git-svn-id: svn://svn.code.sf.net/p/dmtcp/code/trunk@2374 ba6dc0ae-232f-0410-883f-9ebac64fc565
Split autotest.py.in into autotest.py and autotest_config.py.in.

git-svn-id: svn://svn.code.sf.net/p/dmtcp/code/trunk@2375 ba6dc0ae-232f-0410-883f-9ebac64fc565
Fix for distclean.

git-svn-id: svn://svn.code.sf.net/p/dmtcp/code/trunk@2376 ba6dc0ae-232f-0410-883f-9ebac64fc565