dist: ship buildconf.bat too

As the winbuild/* stuff uses it!

Makefile.am

@@ -5,7 +5,7 @@
 #                            | (__| |_| |  _ <| |___
 #                             \___|\___/|_| \_\_____|
 #
-# Copyright (C) 1998 - 2015, Daniel Stenberg, <daniel@haxx.se>, et al.
+# Copyright (C) 1998 - 2016, Daniel Stenberg, <daniel@haxx.se>, et al.
 #
 # This software is licensed as described in the file COPYING, which
 # you should have received as part of this distribution. The terms
@@ -130,7 +130,8 @@ WINBUILD_DIST = winbuild/BUILD.WINDOWS.txt winbuild/gen_resp_file.bat	\
 
 EXTRA_DIST = CHANGES COPYING maketgz Makefile.dist curl-config.in	\
  RELEASE-NOTES buildconf libcurl.pc.in MacOSX-Framework scripts/zsh.pl	\
- $(CMAKE_DIST) $(VC_DIST) $(WINBUILD_DIST) lib/libcurl.vers.in
+ $(CMAKE_DIST) $(VC_DIST) $(WINBUILD_DIST) lib/libcurl.vers.in          \
+ buildconf.bat
 
 CLEANFILES = $(VC6_LIBDSP) $(VC6_SRCDSP) $(VC7_LIBVCPROJ) $(VC7_SRCVCPROJ)	\
  $(VC71_LIBVCPROJ) $(VC71_SRCVCPROJ) $(VC8_LIBVCPROJ) $(VC8_SRCVCPROJ)	\

buildconf.bat

@@ -6,7 +6,7 @@ rem *                             / __| | | | |_) | |
 rem *                            | (__| |_| |  _ <| |___
 rem *                             \___|\___/|_| \_\_____|
 rem *
-rem * Copyright (C) 1998 - 2015, Daniel Stenberg, <daniel@haxx.se>, et al.
+rem * Copyright (C) 1998 - 2016, Daniel Stenberg, <daniel@haxx.se>, et al.
 rem *
 rem * This software is licensed as described in the file COPYING, which
 rem * you should have received as part of this distribution. The terms
@@ -26,8 +26,6 @@ rem
 rem This batch file must be used to set up a git tree to build on systems where
 rem there is no autotools support (i.e. DOS and Windows).
 rem
-rem This file is not included or required for curl's release archives or daily 
-rem snapshot archives.
 
 :begin
   rem Set our variables