Fix: (1) Windows stack overflow due to buffer too large in peer deserialize, (2) clean up some other stuff seen during debugging and reduce the sizes of some buffers due to Windows small stack size, (3) remove a redundant try/catch.

osdep/OSUtils.cpp

@@ -206,7 +206,7 @@ skip_add_inetaddr:
 
 bool OSUtils::readFile(const char *path,std::string &buf)
 {
-	char tmp[4096];
+	char tmp[1024];
 	FILE *f = fopen(path,"rb");
 	if (f) {
 		for(;;) {