After r311459, some ports can break, because a few of the newly added

prototypes in <tcpd.h> use FILE.  Pull in a minimal forward declaration
of FILE from <stdio.h> to minimize impact.  Sorry for the breakage.

Reported by:	Shawn Webb <shawn.webb@hardenedbsd.org>
X-MFC-With:	r311459

contrib/tcp_wrappers/tcpd.h

@@ -12,6 +12,11 @@
 #define	TCPD_SOCKADDR struct sockaddr_in
 #endif
 
+#ifndef _STDFILE_DECLARED
+#define _STDFILE_DECLARED
+typedef struct __sFILE FILE;
+#endif
+
 /* Structure to describe one communications endpoint. */
 
 #define	STRING_LENGTH	128		/* hosts, users, processes */