Revert "libwebsockets: move to 3.2.1"

This reverts commit 7066486fbb.

LWS 3.2.x and 4.0.x are broken on ath79 and malta-be, (at least)

See https://github.com/warmcat/libwebsockets/issues/2008
and
https://github.com/openwrt/packages/issues/13085

Restore a functional 3.1 release until upstream release.

Signed-off-by: Karl Palsson <karlp@etactica.com>

libs/libwebsockets/Makefile

@@ -8,13 +8,13 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=libwebsockets
-PKG_VERSION:=3.2.1
-PKG_RELEASE:=1
+PKG_VERSION:=3.1.0
+PKG_RELEASE:=2
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
 PKG_SOURCE_SUBDIR:=$(PKG_NAME)-$(PKG_VERSION)
 PKG_SOURCE_URL:=https://codeload.github.com/warmcat/libwebsockets/tar.gz/v$(PKG_VERSION)?
-PKG_HASH:=5b1521002771420bc91e1c91f36bc51f54bf4035c4bebde296dec235a45c33df
+PKG_HASH:=db948be74c78fc13f1f1a55e76707d7baae3a1c8f62b625f639e8f2736298324
 
 PKG_SOURCE_VERSION:=v$(PKG_VERSION)
 

libs/libwebsockets/patches/020-fix-travis.patch

@@ -1,14 +1,14 @@
 --- a/CMakeLists.txt
 +++ b/CMakeLists.txt
-@@ -1482,9 +1482,9 @@ if (CMAKE_COMPILER_IS_GNUCC OR CMAKE_COM
- 	endif()
+@@ -1233,9 +1233,9 @@ if (CMAKE_COMPILER_IS_GNUCC OR CMAKE_COM
+     endif()
  
      if (UNIX AND NOT LWS_WITH_ESP32)
--	    set(CMAKE_C_FLAGS "-Wall -Wsign-compare -Wuninitialized -Werror ${VISIBILITY_FLAG} -Wundef ${GCOV_FLAGS} ${CMAKE_C_FLAGS} ${ASAN_FLAGS}" )
-+	    set(CMAKE_C_FLAGS "-Wall -Wsign-compare -Wuninitialized ${VISIBILITY_FLAG} -Wundef ${GCOV_FLAGS} ${CMAKE_C_FLAGS} ${ASAN_FLAGS}" )
+-	    set(CMAKE_C_FLAGS "-Wall -Wsign-compare -Wignored-qualifiers -Wtype-limits -Wuninitialized -Werror ${VISIBILITY_FLAG} -Wundef ${GCOV_FLAGS} ${CMAKE_C_FLAGS} ${ASAN_FLAGS}" )
++	    set(CMAKE_C_FLAGS "-Wall -Wsign-compare -Wignored-qualifiers -Wtype-limits -Wuninitialized ${VISIBILITY_FLAG} -Wundef ${GCOV_FLAGS} ${CMAKE_C_FLAGS} ${ASAN_FLAGS}" )
      else()
--	    set(CMAKE_C_FLAGS "-Wall -Wsign-compare -Wuninitialized -Werror ${VISIBILITY_FLAG} ${GCOV_FLAGS} ${CMAKE_C_FLAGS}" )
-+	    set(CMAKE_C_FLAGS "-Wall -Wsign-compare -Wuninitialized ${VISIBILITY_FLAG} ${GCOV_FLAGS} ${CMAKE_C_FLAGS}" )
+-	    set(CMAKE_C_FLAGS "-Wall -Wsign-compare -Wignored-qualifiers -Wtype-limits -Wuninitialized -Werror ${VISIBILITY_FLAG} ${GCOV_FLAGS} ${CMAKE_C_FLAGS}" )
++	    set(CMAKE_C_FLAGS "-Wall -Wsign-compare -Wignored-qualifiers -Wtype-limits -Wuninitialized ${VISIBILITY_FLAG} ${GCOV_FLAGS} ${CMAKE_C_FLAGS}" )
      endif()
  endif ()