patch 8.0.0210: no support for bracketed paste

Problem:    Vim does not support bracketed paste, as implemented by xterm and
            other terminals.
Solution:   Add t_BE, t_BD, t_PS and t_PE.
diff --git a/src/option.c b/src/option.c
index 6f9610d..cc68cdf 100644
--- a/src/option.c
+++ b/src/option.c
@@ -3040,6 +3040,8 @@
     p_term("t_ZR", T_CZR)
     p_term("t_8f", T_8F)
     p_term("t_8b", T_8B)
+    p_term("t_BE", T_BE)
+    p_term("t_BD", T_BD)
 
 /* terminal key codes are not in here */