Allows particular modules to handle subrequests properly.

src/http/modules/ngx_http_flv_module.c

diff --git a/src/http/modules/ngx_http_flv_module.c b/src/http/modules/ngx_http_flv_module.c
index 719a011..03a7468 100644
--- a/src/http/modules/ngx_http_flv_module.c
+++ b/src/http/modules/ngx_http_flv_module.c
@@ -235,7 +235,7 @@
     b->file_last = of.size;
 
     b->in_file = b->file_last ? 1: 0;
-    b->last_buf = 1;
+    b->last_buf = (r == r->main) ? 1 : 0;
     b->last_in_chain = 1;
 
     b->file->fd = of.fd;

src/http/modules/ngx_http_gzip_static_module.c

diff --git a/src/http/modules/ngx_http_gzip_static_module.c b/src/http/modules/ngx_http_gzip_static_module.c
index 46ce8f3..b0183e0 100644
--- a/src/http/modules/ngx_http_gzip_static_module.c
+++ b/src/http/modules/ngx_http_gzip_static_module.c
@@ -245,7 +245,7 @@
     b->file_last = of.size;
 
     b->in_file = b->file_last ? 1 : 0;
-    b->last_buf = 1;
+    b->last_buf = (r == r->main) ? 1 : 0;
     b->last_in_chain = 1;
 
     b->file->fd = of.fd;

src/http/modules/ngx_http_mp4_module.c

diff --git a/src/http/modules/ngx_http_mp4_module.c b/src/http/modules/ngx_http_mp4_module.c
index 433e118..2c8cfd1 100644
--- a/src/http/modules/ngx_http_mp4_module.c
+++ b/src/http/modules/ngx_http_mp4_module.c
@@ -616,7 +616,7 @@
     b->file_last = of.size;
 
     b->in_file = b->file_last ? 1 : 0;
-    b->last_buf = 1;
+    b->last_buf = (r == r->main) ? 1 : 0;
     b->last_in_chain = 1;
 
     b->file->fd = of.fd;

src/http/modules/ngx_http_stub_status_module.c

diff --git a/src/http/modules/ngx_http_stub_status_module.c b/src/http/modules/ngx_http_stub_status_module.c
index f780869..96abe92 100644
--- a/src/http/modules/ngx_http_stub_status_module.c
+++ b/src/http/modules/ngx_http_stub_status_module.c
@@ -121,7 +121,7 @@
     r->headers_out.status = NGX_HTTP_OK;
     r->headers_out.content_length_n = b->last - b->pos;
 
-    b->last_buf = 1;
+    b->last_buf = (r == r->main) ? 1 : 0;
 
     rc = ngx_http_send_header(r);