RFR[15] JDK-8183369 : RFC unconformity of HttpURLConnection with proxy

Hello All, Could you please review this patch. This patch fixes the RFC unconformity of HttpURLConnection with proxy issue. 1.Change in HttpURLConnection.java is to make sure we do retry with proxy as mentioned in RFC 2.Change is test case HttpURLConWithProxy.java is to make sure we don'

RE: RFR: JDK-8238386: (sctp) jdk.sctp/unix/native/libsctp/SctpNet.c "multiple definition" link errors with GCC10

Thanks Chris I extracted the SCTP code change from the original patch, for net-dev review only. Could you please sponsor this? (I do not have push permission), thanks in advance. JBS: https://bugs.openjdk.java.net/browse/JDK-8238386 Webrev: http://cr.openjdk.java.net/~qpzhang/8238386/webrev.01