+LTTng 0.165 does a large refactoring/cleanup. It relicenses all the missing
+LTTng files that can be shared with the UST tracer. All code imported from
+relay.c is now in ltt-relay-splice.c, which is kept under the GPL license (and
+only useful within the kernel anyway).<br>
+LTTng 0.166 fixes trace teardown error for 32-bit machines introduced in
+0.165.<br>
+LTTng 0.167 supports kernel 2.6.31.6.<br>
+ltt-control 0.73 adds per-channel parameter "switch_timer" (periodic buffer
+flush timer interval).<br>
+LTTV 0.12.20 fixes a dependency on non-standard __SIZEOF_LONG__. Uses __WORDSIZE
+instead. Should fix some 32-bit builds.<br>
+ltt-control 0.74 fixes a missing return value from liblttctl.<br>
+LTTng 0.168 makes periodic flush energy-efficient, adds cpu idle notifiers for
+x86_32, x86_64 to deal with periodic flush vs idle interaction (other
+architectures are todo). Also fix a ltt-relay-vfs file close bug, increase
+default vm_state channel subbuffer size, fix ltt-ascii so it compiles after
+cleanup (ltt-ascii is still experimental, will need to be adapted to new
+periodic flush scheme).<br>
+LTTng 0.169 fixes trace teardown.<br>
+LTTng 0.170 fixes kref issues (since refactoring) and cpu hotplug vs trace
+teardown issues (caused by race in DebugFS). Simplification of trace
+creation/remove locking scheme.<br>