slow moxi mem leaks on reconfig

on osx, running dev build of moxi with...

MallocScribbe=1 MallocGuardEdges=1 MallocStackLogging=1 MallocErrorAbort=1 ./moxi -Z port_listen=13001,usr=Administrator,pwd=111111,default_bucket_name=default,downstream_max=1024,downstream_conn_max=16,connect_max_errors=3,connect_retry_interval=30000,connect_timeout=400,auth_timeout=100,cycle=200,downstream_conn_queue_timeout=200,downstream_timeout=5000,wait_queue_timeout=200 -z url=http://127.0.0.1:9000/pools/default/saslBucketsStreaming -p 0 -Y y -O stderr

and memcachetest of...

../memcachetest/memcachetest -h 127.0.0.1:13001 -i 1000 -c 10000 -l -t 30

then leaks shows output of...

Leak: 0x101a47000 size=6656 zone: DefaultMallocZone_0x1000f8000 string '?'
Call stack: [thread 0x100504000]: | thread_start | _pthread_start | worker_libevent | event_base_loop | drive_machine | try_read_command | cproxy_process_upstream_ascii | cproxy_assign_downstream | cproxy_reserve_downstream | cproxy_add_downstream | cproxy_create_downstream | cproxy_copy_behaviors | calloc | malloc_zone_calloc
Leak: 0x101a4ba00 size=6656 zone: DefaultMallocZone_0x1000f8000 string '?'
Call stack: [thread 0x10060a000]: | thread_start | _pthread_start | worker_libevent | event_base_loop | drive_machine | cproxy_assign_downstream | cproxy_reserve_downstream | cproxy_add_downstream | cproxy_create_downstream | cproxy_copy_behaviors | calloc | malloc_zone_calloc
Leak: 0x101a52400 size=6656 zone: DefaultMallocZone_0x1000f8000 string '?'
Call stack: [thread 0x100587000]: | thread_start | _pthread_start | worker_libevent | event_base_loop | drive_machine | try_read_command | cproxy_process_upstream_ascii | cproxy_assign_downstream | cproxy_reserve_downstream | cproxy_add_downstream | cproxy_create_downstream | cproxy_copy_behaviors | calloc | malloc_zone_calloc
Leak: 0x101a53e00 size=6656 zone: DefaultMallocZone_0x1000f8000 string '?'
Call stack: [thread 0x100587000]: | thread_start | _pthread_start | worker_libevent | event_base_loop | drive_machine | try_read_command | cproxy_process_upstream_ascii | cproxy_assign_downstream | cproxy_reserve_downstream | cproxy_add_downstream | cproxy_create_downstream | cproxy_copy_behaviors | calloc | malloc_zone_calloc
Leak: 0x100203c30 size=48 zone: DefaultMallocZone_0x1000f8000 string '127.0.0.1:12006:default:(null):0'
Call stack: [thread 0x100504000]: | thread_start | _pthread_start | worker_libevent | event_base_loop | drive_machine | cproxy_assign_downstream | cproxy_forward | cproxy_forward_a2b_downstream | cproxy_connect_downstream | zstored_acquire_downstream_conn | strdup | malloc | malloc_zone_malloc
Leak: 0x100203ca0 size=48 zone: DefaultMallocZone_0x1000f8000 string '127.0.0.1:12006:default:(null):0'
Call stack: [thread 0x100504000]: | thread_start | _pthread_start | worker_libevent | event_base_loop | drive_machine | cproxy_assign_downstream | cproxy_forward | cproxy_forward_a2b_downstream | cproxy_connect_downstream | zstored_acquire_downstream_conn | strdup | malloc | malloc_zone_malloc

[... many repeats of those host_ident/strdup and behaviors/calloc leaks ...]