NGX_POP3_NOOP      74 src/mail/ngx_mail_parse.c                         s->command = NGX_POP3_NOOP;
NGX_POP3_NOOP     181 src/mail/ngx_mail_pop3_handler.c             case NGX_POP3_NOOP:
NGX_POP3_NOOP     211 src/mail/ngx_mail_pop3_handler.c             case NGX_POP3_NOOP: