ns_server closes/rejects ssl connections when it's not happy with default cipher list

This can only be reproduced on Mac OS X. To reproduce, obtain libcouchbase version 2.5.7 on OS X:

Looking at the logs:
[error_logger:error,2016-04-12T13:29:46.695-07:00,ns_1@127.0.0.1:error_logger<0.6.0>:ale_error_logger_handler:do_log:203]
=========================ERROR REPORT=========================
application: mochiweb
"Accept failed error"
"{'EXIT',\n {{function_clause,\n [{tls_v1,enum_to_oid,[28],[

{file,\"tls_v1.erl\"}

,

{line,404}

]},\n {ssl_handshake,'dec_hello_extensions/2-blc$^1/1-0',1,\n [

{file,\"ssl_handshake.erl\"},{line,1657}]},\n {ssl_handshake,'dec_hello_extensions/2-blc$^1/1-0',1,\n [{file,"ssl_handshake.erl"}

,

{line,1657}]},\n {ssl_handshake,dec_hello_extensions,2,\n [{file,\"ssl_handshake.erl\"},{line,1657}

]},\n {tls_handshake,decode_handshake,3,\n [

{file,\"tls_handshake.erl\"},{line,182}]},\n {tls_handshake,get_tls_handshake_aux,3,\n [{file,"tls_handshake.erl"}

,

{line,153}

]},\n {tls_connection,next_state,4,\n [

{file,\"tls_connection.erl\"}

,

{line,454}

]},\n {gen_fsm,handle_msg,7,[

{file,\"gen_fsm.erl\"}

,

{line,505}

]}]},\n {gen_fsm,sync_send_all_state_event,\n [<0.23229.6>,

{start,infinity}

,infinity]}}}"

[error_logger:error,2016-04-12T13:29:46.695-07:00,ns_1@127.0.0.1:error_logger<0.6.0>:ale_error_logger_handler:do_log:203]

To fix this, I needed to explicitly add a list of supported ciphers (https://github.com/couchbase/libcouchbase/commit/dd67004083d2611abd5a2f6a8fd20cd14cd1755c). This is only a problem with ns_server, and not memcached. If there is some magic cipher string to use, is it published somewhere?