Incorrect psk will be provided by psk_server_callback() because leading zero
is skipped by BN_bn2bin() and BN_num_bytes().

Signed-off-by: Aska.Wu <askawu@gmail.com>

Relate to issues #327 and #63.
mosq->sock may be closed before FD_SET(mosq->sock, &writefds) and
FD_ISSET(mosq->sock, &writefds) but after judgement in line 947
if(mosq->sock != INVALID_SOCKET). FD_SET(-1, ...) and FD_ISSET(-1, ...)
would certainly crash.

Signed-off-by: Zard1096 <mr.zardqi@gmail.com>

From http://man7.org/linux/man-pages/man3/getdtablesize.3.html

:

"It is not specified in POSIX.1; portable applications should employ
sysconf(_SC_OPEN_MAX) instead of this call."

Specifically this fixes a build failure on Android which does not
have getdtablesize().

Signed-off-by: Fredrik Fornwall <fredrik@fornwall.net>

Checks for '/' are no longer made, this character is a much lower risk
and is widely used in usernames.

Bug: https://github.com/eclipse/mosquitto/issues/462

Auth plugins can be configured to disable the check for +# in
usernames/client ids with the auth_plugin_deny_special_chars option.

Thanks to wiebeytec.

Bug: https://github.com/eclipse/mosquitto/issues/462

Thanks to mikeS7.

Bug: https://github.com/eclipse/mosquitto/issues/477

* Websocket were always marked as "want_write" (even if they only
  want to read, or worse want nothing).
* Websocket FD was read twice in some case (when socket recv queue was
  larger that size read by libwebsocket)

Signed-off-by: Pierre Fersing <pierre.fersing@bleemeo.com>

Not implemented on Windows.

Thanks to Moshe Zioni.

Bug: https://github.com/eclipse/mosquitto/issues/468

Thanks to Brian Block.

Bug: https://github.com/eclipse/mosquitto/issues/427

Thanks to spinachmedia.

Bug: https://github.com/eclipse/mosquitto/issues/417

Signed-off-by: Jan Lukavsky <je.ik@seznam.cz>

Thanks to Tifaifai Maupiti.

Bug: https://github.com/eclipse/mosquitto/issues/446

ERR_remove_state has been marked deprecated in OpenSSL 1.1.0 and do
nothing, as the OpenSSL libraries now normally do all thread
initialization and deinitialisation automatically.

Signed-off-by: Jelle van der Waa <jelle@vdwaa.nl>

Do not add -lanl to BROKER_LIBS for all Linux builds.
Indeed, -lanl is only needed for getaddrinfo_a which is only used in
_mosquitto_try_connect_step1 when WITH_ADNS is set

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>

Thanks to Ali Utku Selen.