the "Overwrite" header line

src/http/ngx_http_request.c

diff --git a/src/http/ngx_http_request.c b/src/http/ngx_http_request.c
index 74ca4b8..db64c5b 100644
--- a/src/http/ngx_http_request.c
+++ b/src/http/ngx_http_request.c
@@ -141,6 +141,9 @@
     { ngx_string("Destination"), offsetof(ngx_http_headers_in_t, destination),
                  ngx_http_process_header_line },
 
+    { ngx_string("Overwrite"), offsetof(ngx_http_headers_in_t, overwrite),
+                 ngx_http_process_header_line },
+
     { ngx_string("Date"), offsetof(ngx_http_headers_in_t, date),
                  ngx_http_process_header_line },
 #endif

src/http/ngx_http_request.h

diff --git a/src/http/ngx_http_request.h b/src/http/ngx_http_request.h
index 22e17ee..0c7f5cb 100644
--- a/src/http/ngx_http_request.h
+++ b/src/http/ngx_http_request.h
@@ -194,6 +194,7 @@
 #if (NGX_HTTP_DAV)
     ngx_table_elt_t                  *depth;
     ngx_table_elt_t                  *destination;
+    ngx_table_elt_t                  *overwrite;
     ngx_table_elt_t                  *date;
 #endif