Make the default for --modify-window be 2 on cygwin.

NEWS

@@ -31,6 +31,8 @@ rsync changes since last release
     * Properly support IPv6 addresses in the rsyncd.conf "hosts allow"
       and "hosts deny" fields.  (Hideaki Yoshifuji)
 
+    * Set the default value of --modify-window to 2 on Cygwin.  (Max Bowsher)
+
   BUG FIXES:
   
     * Fix "forward name lookup failed" errors on AIX 4.3.3.  (John

configure.in

@@ -247,6 +247,15 @@ yes
 	AC_SEARCH_LIBS(getaddrinfo, inet6)
 fi
 
+AC_MSG_CHECKING([default value for --modify-window])
+case $host_os in
+	*cygwin* ) DEFAULT_MODIFY_WINDOW=${DEFAULT_MODIFY_WINDOW:-2};;
+	       * ) DEFAULT_MODIFY_WINDOW=${DEFAULT_MODIFY_WINDOW:-0};;
+esac
+AC_MSG_RESULT($DEFAULT_MODIFY_WINDOW)
+AC_DEFINE_UNQUOTED(DEFAULT_MODIFY_WINDOW, $DEFAULT_MODIFY_WINDOW,
+	[Set to the default value for the --modify-window option])
+
 AC_C_BIGENDIAN
 AC_HEADER_DIRENT
 AC_HEADER_TIME

options.c

@@ -81,11 +81,7 @@ int only_existing=0;
 int opt_ignore_existing=0;
 int max_delete=0;
 int ignore_errors=0;
-#ifdef _WIN32
-int modify_window=2;
-#else
-int modify_window=0;
-#endif
+int modify_window=DEFAULT_MODIFY_WINDOW;
 int blocking_io=-1;