[libsoup/wip/http2] Add SOUP_ENABLE_HTTP2 env var

[Patrick Griffis <pgriffis src gnome org>]

commit 700340cb901be6c8dbd0aec06f739f96ab8dd558
Author: Patrick Griffis <pgriffis igalia com>
Date:   Mon May 17 10:50:25 2021 -0500

    Add SOUP_ENABLE_HTTP2 env var
    
    HTTP2 will be disabled by default and can be opt-in by setting this
    env var to any value.

 libsoup/soup-session.c | 5 +++--
 tests/http2-test.c     | 2 ++
 2 files changed, 5 insertions(+), 2 deletions(-)
---
diff --git a/libsoup/soup-session.c b/libsoup/soup-session.c
index 80a1bb0a..f2ac9876 100644
--- a/libsoup/soup-session.c
+++ b/libsoup/soup-session.c
@@ -1788,8 +1788,9 @@ get_connection_for_host (SoupSession *session,
                return conn;
        }
 
-        force_http1 = soup_message_get_force_http1 (item->msg);
-        if (g_getenv ("SOUP_FORCE_HTTP1"))
+        if (g_getenv ("SOUP_ENABLE_HTTP2"))
+                force_http1 = soup_message_get_force_http1 (item->msg);
+        else
                 force_http1 = TRUE;
 
        for (conns = host->connections; conns; conns = conns->next) {
diff --git a/tests/http2-test.c b/tests/http2-test.c
index f7828bfc..d5c75c43 100644
--- a/tests/http2-test.c
+++ b/tests/http2-test.c
@@ -561,6 +561,8 @@ main (int argc, char **argv)
                 return 1;
         }
 
+        g_setenv ("SOUP_ENABLE_HTTP2", "1", TRUE);
+
         g_test_add ("/http2/basic/async", Test, NULL,
                     setup_session,
                     do_basic_async_test,