If you set `TRIPE_TEST_TRACEOPTS' then tracing is turned on with the
appropriate options. The obvious value is `A'.
## Running standard programs with useful options.
m4_define([TRIPE],
[env TRIPE_PRIVHELPER=$abs_top_builddir/priv/tripe-privhelper \
- $abs_top_builddir/server/tripe -F -d. -aadmin -p0 -b127.0.0.1 -talice])
+ $abs_top_builddir/server/tripe -F -d. -aadmin -p0 -b127.0.0.1 -talice \
+ ${TRIPE_TEST_TRACEOPTS+-T$TRIPE_TEST_TRACEOPTS}])
m4_define([TRIPECTL], [$abs_top_builddir/client/tripectl -d. -aadmin])
m4_define([USLIP], [$abs_top_builddir/uslip/tripe-uslip])
m4_define([PKSTREAM],