invalid_header    794 http/ngx_http_parse.c             r->invalid_header = 0;
invalid_header    816 http/ngx_http_parse.c                 r->invalid_header = 1;
invalid_header    841 http/ngx_http_parse.c                     r->invalid_header = 1;
invalid_header    878 http/ngx_http_parse.c             r->invalid_header = 1;
invalid_header   1020 http/ngx_http_request.c             if (r->invalid_header && cscf->ignore_invalid_headers) {
invalid_header    447 http/ngx_http_request.h     unsigned                          invalid_header:1;