Request body: c->error on "100 Continue" errors (ticket #1194).

src/http/ngx_http_request_body.c

diff --git a/src/http/ngx_http_request_body.c b/src/http/ngx_http_request_body.c
index 0641329..d84dbf8 100644
--- a/src/http/ngx_http_request_body.c
+++ b/src/http/ngx_http_request_body.c
@@ -835,6 +835,8 @@
 
     /* we assume that such small packet should be send successfully */
 
+    r->connection->error = 1;
+
     return NGX_ERROR;
 }