Fix: memory leak when UST events are enabled with exclusions

Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
Fix: relay create session for version before 2.4

Signed-off-by: Julien Desfossez <jdesfossez@efficios.com>
Signed-off-by: David Goulet <dgoulet@efficios.com>
Fix: remove free in unit test not needed anymore

Signed-off-by: David Goulet <dgoulet@efficios.com>
Fix: measure UST clock offset with best sample (v2)

Fixes #729

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: David Goulet <dgoulet@efficios.com>
Fix: add --jul-tcp-port to sessiond man page

Signed-off-by: David Goulet <dgoulet@efficios.com>
Fix: handle invalid URL passed to lttng_create_session_live

uri_parse_str_urls() returns 0 if the URL passed is NULL thus using
lttng_create_session_live() without an URL is invalid.

Reported-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
Signed-off-by: David Goulet <dgoulet@efficios.com>