ngx_mail_pop3_auth_plain_capability 35 mail/ngx_mail_pop3_module.c static ngx_str_t ngx_mail_pop3_auth_plain_capability = ngx_mail_pop3_auth_plain_capability 235 mail/ngx_mail_pop3_module.c conf->auth_capability = ngx_mail_pop3_auth_plain_capability;