Test for presence of bison and flex when building from git

[ Update by Mathieu Desnoyers: handle VPATH build from tarball
  by prefixing path with $srcdir. ]

Signed-off-by: Yannick Brosseau <yannick.brosseau@gmail.com>
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Documentation: fix thread quit pipe comment

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Fix: add missing snapshot header to dist tarball

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Version 2.3.0-rc1

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Documentation: create --snapshot in manpage

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Manpage: cleanup layout of add-context

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Manpage: cleanup layout of calibrate

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Manpage: cleanup layout of create

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Manpage: cleanup layout of destroy

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Manpage: cleanup layout of enable-channel

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Manpage: cleanup layout of enable-event

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Manpage: cleanup layout of disable-channel

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Manpage: cleanup layout of disable-event

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Manpage: cleanup layout of list

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Manpage: cleanup layout of set-session

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Manpage: cleanup layout of snapshot

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Manpage: cleanup layout of start

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Manpage: cleanup layout of stop

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Manpage: cleanup layout of version

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Manpage: cleanup layout of view

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>