curl: backport fix for crash with NO_PROXY

Backported from https://github.com/curl/curl/commit/3eff1c5092e542819ac7e6454a70c94b36ab

srcpkgs/curl/patches/fix-crash-no-proxy.patch

@@ -0,0 +1,54 @@
+From 3eff1c5092e542819ac7e6454a70c94b36ab2a40 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Martin=20Ba=C5=A1ti?= <mbasti@redhat.com>
+Date: Thu, 27 Aug 2020 23:09:56 +0200
+Subject: [PATCH] http_proxy: do not crash with HTTPS_PROXY and NO_PROXY set
+
+... in case NO_PROXY takes an effect
+
+Without this patch, the following command crashes:
+
+    $ GIT_CURL_VERBOSE=1 NO_PROXY=github.com HTTPS_PROXY=https://example.com \
+        git clone https://github.com/curl/curl.git
+
+Minimal libcurl-based reproducer:
+
+    #include <curl/curl.h>
+
+    int main() {
+      CURL *curl = curl_easy_init();
+      if(curl) {
+        CURLcode ret;
+        curl_easy_setopt(curl, CURLOPT_URL, "https://github.com/");
+        curl_easy_setopt(curl, CURLOPT_PROXY, "example.com");
+        /* set the proxy type */
+        curl_easy_setopt(curl, CURLOPT_PROXYTYPE, CURLPROXY_HTTPS);
+        curl_easy_setopt(curl, CURLOPT_NOPROXY, "github.com");
+        curl_easy_setopt(curl, CURLOPT_VERBOSE, 1L);
+        ret = curl_easy_perform(curl);
+        curl_easy_cleanup(curl);
+        return ret;
+      }
+      return -1;
+    }
+
+Assisted-by: Kamil Dudka
+Bug: https://bugzilla.redhat.com/1873327
+Closes #5902
+---
+ lib/url.c | 3 +++
+ 1 file changed, 3 insertions(+)
+
+diff --git a/lib/url.c b/lib/url.c
+index d342c4e6986..2f02a0a16a3 100644
+--- a/lib/url.c
++++ b/lib/url.c
+@@ -2556,6 +2556,9 @@ static CURLcode create_conn_helper_init_proxy(struct connectdata *conn)
+     conn->bits.socksproxy = FALSE;
+     conn->bits.proxy_user_passwd = FALSE;
+     conn->bits.tunnel_proxy = FALSE;
++    /* CURLPROXY_HTTPS does not have its own flag in conn->bits, yet we need
++       to signal that CURLPROXY_HTTPS is not used for this connection */
++    conn->http_proxy.proxytype = CURLPROXY_HTTP;
+   }
+ 
+ out:

srcpkgs/curl/template

@@ -1,7 +1,7 @@
 # Template file for 'curl'
 pkgname=curl
 version=7.72.0
-revision=1
+revision=2
 build_style=gnu-configure
 configure_args="ac_cv_sizeof_off_t=8 --enable-threaded-resolver --enable-ipv6
  $(vopt_with rtmp) $(vopt_with gssapi) $(vopt_enable ldap) $(vopt_with gnutls)