Per-connection memory leak

A memory leak of 56 bytes per connection is observed after connecting/disconnecting to a bucket with CB server on another node:

==8959== 560 (400 direct, 160 indirect) bytes in 10 blocks are definitely lost in loss record 729 of 785
{{ ==8959==    at 0x4C2C049: calloc (vg_replace_malloc.c:762)}}
{{ ==8959==    by 0x4E83563: lcb_st::request_config(void const*, lcb::Server*) (getconfig.cc:56)}}
{{ ==8959==    by 0x4E7513F: CccpProvider::schedule_next_request(lcb_error_t, bool) (bc_cccp.cc:147)}}
{{ ==8959==    by 0x4E5BA1B: timer_callback (timer.c:45)}}
{{ ==8959==    by 0x549AA13: event_process_active_single_queue (event.c:1350)}}
{{ ==8959==    by 0x549AA13: event_process_active (event.c:1420)}}
{{ ==8959==    by 0x549AA13: event_base_loop (event.c:1621)}}
{{ ==8959==    by 0x4BDFCA: con_thr (store_couchbase.c:3945)}}
{{ ==8959==    by 0x7F00E24: start_thread (pthread_create.c:308)}}
{{ ==8959==    by 0x8213BAC: clone (clone.S:113)}}