Modules compatibility: removed two NGX_HAVE_DEFERRED_ACCEPT checks.

Removed (NGX_HAVE_DEFERRED_ACCEPT && defined TCP_DEFER_ACCEPT)
from the signature accordingly.

src/core/ngx_connection.h

diff --git a/src/core/ngx_connection.h b/src/core/ngx_connection.h
index 36907dd..1472090 100644
--- a/src/core/ngx_connection.h
+++ b/src/core/ngx_connection.h
@@ -73,14 +73,12 @@
     unsigned            add_reuseport:1;
     unsigned            keepalive:2;
 
-#if (NGX_HAVE_DEFERRED_ACCEPT)
     unsigned            deferred_accept:1;
     unsigned            delete_deferred:1;
     unsigned            add_deferred:1;
-#ifdef SO_ACCEPTFILTER
+#if (NGX_HAVE_DEFERRED_ACCEPT && defined SO_ACCEPTFILTER)
     char               *accept_filter;
 #endif
-#endif
 #if (NGX_HAVE_SETFIB)
     int                 setfib;
 #endif

src/core/ngx_module.h

diff --git a/src/core/ngx_module.h b/src/core/ngx_module.h
index 51a9baa..10a7eab 100644
--- a/src/core/ngx_module.h
+++ b/src/core/ngx_module.h
@@ -80,11 +80,7 @@
 #define NGX_MODULE_SIGNATURE_11  "0"
 #endif
 
-#if (NGX_HAVE_DEFERRED_ACCEPT && defined TCP_DEFER_ACCEPT)
 #define NGX_MODULE_SIGNATURE_12  "1"
-#else
-#define NGX_MODULE_SIGNATURE_12  "0"
-#endif
 
 #if (NGX_HAVE_SETFIB)
 #define NGX_MODULE_SIGNATURE_13  "1"

src/http/ngx_http_core_module.h

diff --git a/src/http/ngx_http_core_module.h b/src/http/ngx_http_core_module.h
index 78f69e2..628679f 100644
--- a/src/http/ngx_http_core_module.h
+++ b/src/http/ngx_http_core_module.h
@@ -72,6 +72,7 @@
 #if (NGX_HAVE_INET6)
     unsigned                   ipv6only:1;
 #endif
+    unsigned                   deferred_accept:1;
     unsigned                   reuseport:1;
     unsigned                   so_keepalive:2;
     unsigned                   proxy_protocol:1;
@@ -94,9 +95,6 @@
 #if (NGX_HAVE_DEFERRED_ACCEPT && defined SO_ACCEPTFILTER)
     char                      *accept_filter;
 #endif
-#if (NGX_HAVE_DEFERRED_ACCEPT && defined TCP_DEFER_ACCEPT)
-    ngx_uint_t                 deferred_accept;
-#endif
 
     u_char                     addr[NGX_SOCKADDR_STRLEN + 1];
 } ngx_http_listen_opt_t;