Blame SOURCES/httpd-2.4.6-r1594625.patch

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Index: modules/proxy/mod_proxy_wstunnel.c
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===================================================================
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--- a/modules/proxy/mod_proxy_wstunnel.c	(revision 1593857)
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+++ b/modules/proxy/mod_proxy_wstunnel.c	(revision 1594625)
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@@ -477,9 +477,11 @@
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     conn_rec *c = r->connection;
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     apr_pool_t *p = r->pool;
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     apr_uri_t *uri;
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+    int is_ssl = 0;
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     if (strncasecmp(url, "wss:", 4) == 0) {
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         scheme = "WSS";
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+        is_ssl = 1;
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     }
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     else if (strncasecmp(url, "ws:", 3) == 0) {
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         scheme = "WS";
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@@ -503,7 +505,7 @@
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         return status;
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     }
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-    backend->is_ssl = 0;
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+    backend->is_ssl = is_ssl;
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     backend->close = 0;
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     retry = 0;