Revert "Revert "perl-www-curl: curl 7.66.0 compatibility""

This is required as curl 7.66.0 was cherry-picked to openwrt-19.07 3
days ago. Otherwise, compilation of perl-www-curl fails.

This reverts commit ec6cd9b9c3.

lang/perl-www-curl/Makefile

@@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=perl-www-curl
 PKG_VERSION:=4.17
-PKG_RELEASE:=5
+PKG_RELEASE:=6
 
 PKG_SOURCE_URL:=http://www.cpan.org/authors/id/S/SZ/SZBALINT/
 PKG_SOURCE:=WWW-Curl-$(PKG_VERSION).tar.gz

lang/perl-www-curl/patches/210-curl_7.66_compat.patch

@@ -0,0 +1,56 @@
+--- a/Curl.xs
++++ b/Curl.xs
+@@ -70,7 +70,7 @@
+ 
+ 
+ typedef struct {
+-#ifdef __CURL_MULTI_H
++#ifdef CURLINC_MULTI_H
+     struct CURLM *curlm;
+ #else
+     struct void *curlm;
+@@ -234,7 +234,7 @@
+ {
+     perl_curl_multi *self;
+     Newz(1, self, 1, perl_curl_multi);
+-#ifdef __CURL_MULTI_H
++#ifdef CURLINC_MULTI_H
+     self->curlm=curl_multi_init();
+ #else
+     croak("curl version too old to support curl_multi_init()");
+@@ -245,7 +245,7 @@
+ /* delete the multi */
+ static void perl_curl_multi_delete(perl_curl_multi *self)
+ {
+-#ifdef __CURL_MULTI_H
++#ifdef CURLINC_MULTI_H
+     if (self->curlm) 
+         curl_multi_cleanup(self->curlm);
+     Safefree(self);
+@@ -1065,7 +1065,7 @@
+     WWW::Curl::Multi curlm
+     WWW::Curl::Easy curl
+     CODE:
+-#ifdef __CURL_MULTI_H
++#ifdef CURLINC_MULTI_H
+         curl_multi_add_handle(curlm->curlm, curl->curl);
+ #endif
+ 
+@@ -1074,7 +1074,7 @@
+     WWW::Curl::Multi curlm
+     WWW::Curl::Easy curl
+     CODE:
+-#ifdef __CURL_MULTI_H
++#ifdef CURLINC_MULTI_H
+         curl_multi_remove_handle(curlm->curlm, curl->curl);
+ #endif
+ 
+@@ -1149,7 +1149,7 @@
+     PREINIT:
+         int remaining;
+     CODE:
+-#ifdef __CURL_MULTI_H
++#ifdef CURLINC_MULTI_H
+         while(CURLM_CALL_MULTI_PERFORM ==
+             curl_multi_perform(self->curlm, &remaining));
+ 	    RETVAL = remaining;