Add missing parenthesis
Fix --{enable,disable}-transient_supervisors flag

Fix configure's --{enable,disable}-transient_supervisors option: Make
sure it's enabled with --enable and disabled with --disable, not the
other way round.  This also makes --disable the default setting, as
documented.
Merge pull request #144 from weiss/fix-supervisor-start

Add missing parenthesis
Merge pull request #145 from weiss/fix-configure-flag

Fix --enable-transient_supervisors flag