tool: don't explicitly disable SSLv3 in the server

Since SSLv3 is disabled by default now this is not needed anymore, but
it makes enabling SSLv3 using -min-version impossible.

At some point this should be removed anyway (when SSLv3 support is
removed), so might as well do it now and fix this tiny problem.

Change-Id: Ie3f7453b5b5198f33fcc4d4294102f116b8843ae
Reviewed-on: https://boringssl-review.googlesource.com/16404
Reviewed-by: Adam Langley <agl@google.com>
Commit-Queue: Adam Langley <agl@google.com>
CQ-Verified: CQ bot account: commit-bot@chromium.org <commit-bot@chromium.org>

tool/server.cc

@@ -152,7 +152,6 @@ bool Server(const std::vector<std::string> &args) {
   }
 
   bssl::UniquePtr<SSL_CTX> ctx(SSL_CTX_new(TLS_method()));
-  SSL_CTX_set_options(ctx.get(), SSL_OP_NO_SSLv3);
 
   // Server authentication is required.
   if (args_map.count("-key") != 0) {