Session base class now handles the engine events exclusively. It notifies
derived session types using dedicated "attached" and "detached" events.

Couple of bugs was fixed along the way.
Signed-off-by: Martin Sustrik <sustrik@250bpm.com>

* maint:
  Add support for RHEL6 in the spec file

Signed-off-by: Sebastian Otaegui <feniix@gmail.com>

When a session is being closed down its inbound and outbound
pipe pointers are set to null. If (re) connection happens at
that time, session may try to reinistantiate the pipes which
is wrong. This patch allows session to attach pipes only once
in its lifetime.
Signed-off-by: Martin Sustrik <sustrik@250bpm.com>

Signed-off-by: Steven McCoy <steven.mccoy@miru.hk>

Signed-off-by: Steven McCoy <steven.mccoy@miru.hk>

* maint:
  configure.in: Do not patch libtool rpath handling
  Fixing the Red Hat packaging

For historic reasons (mainly compatbility with really old libtool), configure was
patching libtool to not use rpath in binaries. This breaks (among other things)
correct operation of "make check" since the test binaries may not be run with
the correct shared library version.

Current best practice as seen e.g. at http://wiki.debian.org/RpathIssue suggests
that this is no longer an issue, so I'm removing the code that patches libtool.
Signed-off-by: Martin Lucina <mato@kotelna.sk>

When adding ZMQ_VERSION macros, I incorrectly removed
the PACKAGE_VERSION macro. Adding it back.
Signed-off-by: Martin Sustrik <sustrik@250bpm.com>

The patch was supposed to check that pipe writer sends messages
in atomic fashion. However, it prevented the user to read
half of a message and close the socket.
Signed-off-by: Martin Sustrik <sustrik@250bpm.com>

Signed-off-by: Martin Sustrik <sustrik@250bpm.com>

Since executing the timers might modify the source pollsets we have
to defer the initialisation until after the timers have executed.
Signed-off-by: Christian Gudrian <christian.gudrian@fluidon.com>

* maint:
  Version macros added

Conflicts:
	builds/msvc/platform.hpp
Signed-off-by: Martin Sustrik <sustrik@250bpm.com>

Macro ZMQ_VERSION represents the current version of 0MQ
Macro ZMQ_MAKE_VERSION(major,minor,patch) allows to create
a representation of the specified version.
The versions can be compared using simple <, >, ==, etc.
operators.
Signed-off-by: Martin Sustrik <sustrik@250bpm.com>

Missed testing on Win32
Signed-off-by: Martin Lucina <mato@kotelna.sk>

Fix in termination of session attached to a REP socket.
Several fixes of session termination in case of disconnection.
Signed-off-by: Martin Sustrik <sustrik@250bpm.com>

Add signaler_sndbuf_size option to config.hpp which allows the user to
increase the size of the send buffer used by the signalling socketpair.

Implement random backoff for reconnection attempts using a primitive
pseudo-random generation to prevent reconnection storms.

Add wait_before_connect option to config.hpp to allow the user to enable
random delay even on initial connect. Default is false for low latency.
Signed-off-by: Martin Lucina <mato@kotelna.sk>

Specifically, shutdown of child objects is initiated *before* termination
handshake with socket object.
Signed-off-by: Martin Sustrik <sustrik@250bpm.com>

Fix a case where zmq_poll() (poll-based version) could go off into a busy-loop
if no revents are returned and the timeout passed in is zero.

* maint:
  zmq_msg_move called on uninitialised message in xrep_t::xrecv -- fixed

 * Assertion to check that pgm_getaddrinfo is actually returning something.
 * Missing pgm_connect call.
 * Typo on TOS causing immediate abort.
 * Placeholder calls for timeouts whilst continuing spin loop functionality.
 * OpenPGM v5 now supports reference counting so remove init checks.
 * Duplicate UDP unicast port setting, requires one unicast and one multicast.
 * Incorrectly set socket rcvbuf size with sndbuf.
 * Replace std::lexicographical_compare of TSI's with long word integer comparisons.
 * pgm_socket_t::receive returns -1 on no data.

* maint:
  crash when closing an ypipe -- fixed