libwebsockets: bump to version 2.2.1

Also remove patch, as it was committed upstream.

Signed-off-by: Adam Duskett <aduskett@codeblue.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/libwebsockets/libwebsockets.hash

@@ -1,3 +1,2 @@
 # Locally computed:
-sha256	96183cbdfcd6e6a3d9465e854a924b7bfde6c8c6d3384d6159ad797c2e823b4d  libwebsockets-v2.1.1.tar.gz
-sha256	49ae9f959394686d469f960951ece3ad1101655afe64df28ea5b1a61c1d124f0  f9f5a5760782b68fba190fb46d306f7c08f027c0.patch
+sha256	e7f9eaef258e003c9ada0803a9a5636757a5bc0a58927858834fb38a87d18ad2  libwebsockets-v2.2.1.tar.gz

package/libwebsockets/libwebsockets.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-LIBWEBSOCKETS_VERSION = v2.1.1
+LIBWEBSOCKETS_VERSION = v2.2.1
 LIBWEBSOCKETS_SITE = $(call github,warmcat,libwebsockets,$(LIBWEBSOCKETS_VERSION))
 LIBWEBSOCKETS_LICENSE = LGPL-2.1 with exceptions
 LIBWEBSOCKETS_LICENSE_FILES = LICENSE
@@ -12,8 +12,6 @@ LIBWEBSOCKETS_DEPENDENCIES = zlib
 LIBWEBSOCKETS_INSTALL_STAGING = YES
 LIBWEBSOCKETS_CONF_OPTS = -DLWS_WITHOUT_TESTAPPS=ON -DLWS_IPV6=ON
 
-LIBWEBSOCKETS_PATCH = https://github.com/warmcat/libwebsockets/commit/f9f5a5760782b68fba190fb46d306f7c08f027c0.patch
-
 # If LWS_MAX_SMP=1, then there is no code related to pthreads compiled
 # in the library. If unset, LWS_MAX_SMP defaults to 32 and a small
 # amount of pthread mutex code is built into the library.