so_keepalive      121 mail/ngx_mail.h     ngx_flag_t              so_keepalive;
so_keepalive       54 mail/ngx_mail_core_module.c       offsetof(ngx_mail_core_srv_conf_t, so_keepalive),
so_keepalive      161 mail/ngx_mail_core_module.c     cscf->so_keepalive = NGX_CONF_UNSET;
so_keepalive      182 mail/ngx_mail_core_module.c     ngx_conf_merge_value(conf->so_keepalive, prev->so_keepalive, 0);
so_keepalive      123 mail/ngx_mail_proxy_module.c     if (cscf->so_keepalive) {