Example-db plugin: Replace --background with --daemon in Makefile.

git-svn-id: svn://svn.code.sf.net/p/dmtcp/code/trunk@2198 ba6dc0ae-232f-0410-883f-9ebac64fc565
Removed a stray semicolumn.

git-svn-id: svn://svn.code.sf.net/p/dmtcp/code/trunk@2199 ba6dc0ae-232f-0410-883f-9ebac64fc565
Added dmtcp_should_ckpt_file.

git-svn-id: svn://svn.code.sf.net/p/dmtcp/code/trunk@2200 ba6dc0ae-232f-0410-883f-9ebac64fc565
Fixed a bad interaction b/w ProcessInfo and forked-ckpt.

git-svn-id: svn://svn.code.sf.net/p/dmtcp/code/trunk@2201 ba6dc0ae-232f-0410-883f-9ebac64fc565
Fixed handling of DMTCP_PREFIX_PATH.

git-svn-id: svn://svn.code.sf.net/p/dmtcp/code/trunk@2202 ba6dc0ae-232f-0410-883f-9ebac64fc565
Merged workerhijack.cpp into dmtcpworker.cpp.

git-svn-id: svn://svn.code.sf.net/p/dmtcp/code/trunk@2203 ba6dc0ae-232f-0410-883f-9ebac64fc565
Fixed help message for dmtcp_launch.

git-svn-id: svn://svn.code.sf.net/p/dmtcp/code/trunk@2204 ba6dc0ae-232f-0410-883f-9ebac64fc565
Fix return types for readlink and msgrcv.

git-svn-id: svn://svn.code.sf.net/p/dmtcp/code/trunk@2205 ba6dc0ae-232f-0410-883f-9ebac64fc565
Fix return types for some wrappers in PID plugin.

git-svn-id: svn://svn.code.sf.net/p/dmtcp/code/trunk@2206 ba6dc0ae-232f-0410-883f-9ebac64fc565
Restore CWD on restart.

git-svn-id: svn://svn.code.sf.net/p/dmtcp/code/trunk@2207 ba6dc0ae-232f-0410-883f-9ebac64fc565
Bugfix for exec wrappers.
Fix later.