More security-related (control) patches:

- Avoid displaying errors during startup, unless display_startup_errors is enabled.
- Implemented post_size_max limit.  Defaults to 8MB.
- Implemented file_uploads on/off directive (defaults to on).

main/SAPI.h

@@ -64,7 +64,7 @@ typedef struct {
 	char *query_string;
 	char *post_data;
 	char *cookie_data;
-	uint content_length;
+	long content_length;
 	uint post_data_length;
 
 	char *path_translated;
@@ -101,6 +101,7 @@ typedef struct {
 	char *default_mimetype;
 	char *default_charset;
 	HashTable *rfc1867_uploaded_files;
+	long post_max_size;
 } sapi_globals_struct;