Jun Wu <quark@fb.com> [Wed, 09 Mar 2016 02:07:40 +0000] rev 28451
serve: accept multiple values for --daemon-postexec
The next patch will add another postexec command: chdir, which can be used
together with unlink. This patch changes the option type of --daemon-postexec
from string to list to accept multiple commands. The error message of invalid
--daemon-postexec value is also changed to include the actual invalid value.