pdns-recursor: update to 4.3.4

Signed-off-by: Rosen Penev <rosenp@gmail.com>

net/pdns-recursor/patches/200-boost_thread_fix.patch

@@ -1,6 +1,6 @@
 --- a/m4/boost.m4
 +++ b/m4/boost.m4
-@@ -667,12 +667,15 @@
+@@ -671,12 +671,15 @@ LDFLAGS=$boost_filesystem_save_LDFLAGS
  BOOST_DEFUN([Context],
  [boost_context_save_LIBS=$LIBS
   boost_context_save_LDFLAGS=$LDFLAGS
@@ -20,5 +20,5 @@
 +#  LDFLAGS="$LDFLAGS $BOOST_THREAD_LDFLAGS"
 +#fi
  
- if test $boost_major_version -ge 161; then
- BOOST_FIND_LIB([context], [$1],
+ if test $boost_major_version -ge 169; then
+