Read in text mode in a needed place only

Converting CR+LF to LF in blocking_read() which is a underlying read
function, may affect to the functions which do not perform line-based
operation.

    modified:   funcs.c
    modified:   main.c
    modified:   misc.c
    modified:   os2.c
    modified:   shf.c

main.c

@@ -1467,7 +1467,7 @@ openpipe(int *pv)
 	if (pv[1] != lpv[1])
 		close(lpv[1]);
 #ifdef __OS2__
-	setmode(pv[0], O_TEXT);
+	setmode(pv[0], O_BINARY);
 	setmode(pv[1], O_BINARY);
 #endif
 }