Use the capitalisation for header files that cross-compilers want

Microsoft has a recommended capitalisation, but Windows doens't
actually care (in any common configuration). Some cross-compilers
work on case-sensitive OSes without case munging, though, and
typically assume all-lowercase.

Patch by Vincent Ho.

Author: Alex Smith

libnethack/dat/history

@@ -1,5 +1,5 @@
 NetHack History file for release 4.3.0-beta3
-This file was last updated by Alex Smith, 2015-04-01
+This file was last updated by Alex Smith, 2017-09-01
 
 Behold, mortal, the origins of NetHack...
 
@@ -270,8 +270,7 @@ The NetHack 4 distribution also contains contributions from:
     Edoardo Spadolini         Nathan Eady               Tim Visher
     Eric S. Raymond           Nephi                     Trevor Cook
     Fredrik Ljungdahl         Pasi Kallinnen            Tung Nguyen
-    GreyKnight                Patric Müller             Wan-ichi
-    Grunt                     Paul Pliska               Zmy
-    Haruko Numata             Paula Breton              Zsbán Ambrus
-    Hojita Discordia          quuxplusone               
-    
+    GreyKnight                Patric Müller             Vincent Ho
+    Grunt                     Paul Pliska               Wan-ichi
+    Haruko Numata             Paula Breton              Zmy
+    Hojita Discordia          quuxplusone               Zsbán Ambrus

libnethack/src/files.c

@@ -1,11 +1,11 @@
 /* vim:set cin ft=c sw=4 sts=4 ts=8 et ai cino=Ls\:0t0(0 : -*- mode:c;fill-column:80;tab-width:8;c-basic-offset:4;indent-tabs-mode:nil;c-file-style:"k&r" -*-*/
-/* Last modified by Alex Smith, 2015-07-11 */
+/* Last modified by Alex Smith, 2017-09-01 */
 /* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */
 /* NetHack may be freely redistributed.  See license for details. */
 
 #if defined(AIMAKE_BUILDOS_MSWin32)
 # define WIN32_LEAN_AND_MEAN
-# include <Windows.h> /* must be before compilers.h */
+# include <windows.h> /* must be before compilers.h */
 
 # if !defined(S_IRUSR)
 #  define S_IRUSR _S_IREAD

libnethack_common/include/netconnect.h

@@ -1,5 +1,5 @@
 /* vim:set cin ft=c sw=4 sts=4 ts=8 et ai cino=Ls\:0t0(0 : -*- mode:c;fill-column:80;tab-width:8;c-basic-offset:4;indent-tabs-mode:nil;c-file-style:"k&r" -*-*/
-/* Last modified by Alex Smith, 2014-10-05 */
+/* Last modified by Alex Smith, 2017-09-01 */
 /* Copyright (c) Daniel Thaler, 2012. */
 /* Copyright (c) 2014 Alex Smith. */
 /* This network connection library may be freely redistributed under the terms of
@@ -30,9 +30,9 @@
 #  include <sys/select.h>
 #  include <sys/time.h>
 # else
-#  include <Winsock2.h>
-#  include <Ws2def.h>
-#  include <Ws2tcpip.h>
+#  include <winsock2.h>
+#  include <ws2def.h>
+#  include <ws2tcpip.h>
 
 #  define snprintf(buf, len, fmt, ...) \
     _snprintf_s(buf, len, len-1, fmt, __VA_ARGS__)

libuncursed/src/plugins/sdl.c

@@ -1,5 +1,5 @@
 /* vim:set cin ft=c sw=4 sts=4 ts=8 et ai cino=Ls\:0t0(0 : -*- mode:c;fill-column:80;tab-width:8;c-basic-offset:4;indent-tabs-mode:nil;c-file-style:"k&r" -*-*/
-/* Last modified by Alex Smith, 2015-02-28 */
+/* Last modified by Alex Smith, 2017-09-01 */
 /* Copyright (c) 2013 Alex Smith. */
 /* The 'uncursed' rendering library may be distributed under either of the
  * following licenses:
@@ -30,8 +30,8 @@
 #include "uncursed_sdl.h"
 
 #ifdef AIMAKE_BUILDOS_MSWin32
-# include <Winsock2.h>
-# include <Ws2def.h>
+# include <winsock2.h>
+# include <ws2def.h>
 #else
 # include <sys/select.h>
 #endif