Bug fix: I/O reactor must handle all runtime exceptions when connecti…

…ng to remote endpoints

httpcore5/src/main/java/org/apache/hc/core5/reactor/SingleCoreIOReactor.java

@@ -305,7 +305,7 @@ private void processPendingConnectionRequests() {
                 }
                 try {
                     processConnectionRequest(socketChannel, sessionRequest);
-                } catch (final IOException | SecurityException ex) {
+                } catch (final IOException | RuntimeException ex) {
                     Closer.closeQuietly(socketChannel);
                     sessionRequest.failed(ex);
                 }