(getsose): Port from obsolete termcap to terminfo. The old code

manually stripped off padding, which is evil.  The new code does
nothing when the stdout is not connected to a terminal.
(SO, smso, SE, rmso): Rename, static linkage.
(putso, putse): New.
(screen): Use it.

src/client/misc.h

@@ -61,7 +61,15 @@ extern char *SE;
 HANDLE hStdIn;
 #endif
 
+#ifdef _WIN32
+#define getsose() ((void)0)
+#define putso() ((void)0)
+#define putse() ((void)0)
+#else
 void getsose(void);
+void putso(void);
+void putse(void);
+#endif
 int recvline(int s, char *buf);
 int expect(int s, int match, char *buf);
 int handleintr(int);