Merge "sorcery/res_pjsip: Refactor for realtime performance"

configs/samples/pjsip.conf.sample

...ns/5813202e92be_add_contact_expiration_check_interval_.py

include/asterisk/config.h

include/asterisk/res_pjsip.h

include/asterisk/sorcery.h

include/asterisk/strings.h

main/config.c

main/strings.c

res/res_pjsip.c

res/res_pjsip/config_global.c

res/res_pjsip/pjsip_options.c

res/res_pjsip_mwi.c

res/res_pjsip_registrar_expire.c

res/res_sorcery_astdb.c

res/res_sorcery_config.c

res/res_sorcery_memory.c

res/res_sorcery_memory_cache.c

res/res_sorcery_realtime.c

tests/test_config.c

tests/test_sorcery_astdb.c