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diff -up nss/lib/ssl/sslsock.c.transitional nss/lib/ssl/sslsock.c
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--- nss/lib/ssl/sslsock.c.transitional	2018-03-09 17:21:52.593560971 +0100
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+++ nss/lib/ssl/sslsock.c	2018-03-09 17:22:21.096926523 +0100
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@@ -67,7 +67,7 @@ static sslOptions ssl_defaults = {
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     .noLocks = PR_FALSE,
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     .enableSessionTickets = PR_FALSE,
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     .enableDeflate = PR_FALSE,
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-    .enableRenegotiation = SSL_RENEGOTIATE_REQUIRES_XTN,
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+    .enableRenegotiation = SSL_RENEGOTIATE_TRANSITIONAL,
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     .requireSafeNegotiation = PR_FALSE,
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     .enableFalseStart = PR_FALSE,
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     .cbcRandomIV = PR_TRUE,