SEL_NL is different between Windows and Unix; move it out into the

platform-specific header files.

[originally from svn r2043]

putty.h

@@ -99,8 +99,6 @@ typedef struct backend_tag Backend;
 #define ATTR_CUR_AND (~(ATTR_BOLD|ATTR_REVERSE|ATTR_BLINK|ATTR_COLOURS))
 #define ATTR_CUR_XOR 0x00BA0000UL
 
-#define SEL_NL { 13, 10 }
-
 GLOBAL int rows, cols, savelines;
 
 GLOBAL int has_focus;

unix/unix.h

@@ -16,6 +16,11 @@ extern Backend pty_backend;
  */
 #define SELECTION_NUL_TERMINATED 0
 
+/*
+ * Under X, copying to the clipboard terminates lines with just LF.
+ */
+#define SEL_NL { 10 }
+
 /* Simple wraparound timer function */
 unsigned long getticks(void);	       /* based on gettimeofday(2) */
 #define GETTICKCOUNT getticks

winstuff.h

@@ -64,6 +64,11 @@ GLOBAL HINSTANCE hinst;
  */
 #define SELECTION_NUL_TERMINATED 1
 
+/*
+ * On Windows, copying to the clipboard terminates lines with CRLF.
+ */
+#define SEL_NL { 13, 10 }
+
 /*
  * Exports from winctrls.c.
  */