Add explicit keys for the bracketed paste sequences, both to avoid mix

ups with other keys and to make logs clearer.

input-keys.c

@@ -46,6 +46,10 @@ static const struct input_key_ent input_keys[] = {
 	/* Backspace key. */
 	{ KEYC_BSPACE,		"\177",		0 },
 
+	/* Paste keys. */
+	{ KEYC_PASTE_START,	"\033[200~",	0 },
+	{ KEYC_PASTE_END,	"\033[201~",	0 },
+
 	/* Function keys. */
 	{ KEYC_F1,		"\033OP",	0 },
 	{ KEYC_F2,		"\033OQ",	0 },

key-string.c

@@ -251,6 +251,10 @@ key_string_lookup_key(key_code key)
 		return ("FocusIn");
 	if (key == KEYC_FOCUS_OUT)
 		return ("FocusOut");
+	if (key == KEYC_PASTE_START)
+		return ("PasteStart");
+	if (key == KEYC_PASTE_END)
+		return ("PasteEnd");
 	if (key == KEYC_MOUSE)
 		return ("Mouse");
 	if (key == KEYC_DRAGGING)

tmux.h

@@ -127,6 +127,10 @@ enum {
 	KEYC_FOCUS_IN = KEYC_BASE,
 	KEYC_FOCUS_OUT,
 
+	/* Paste brackets. */
+	KEYC_PASTE_START,
+	KEYC_PASTE_END,
+
 	/* Mouse keys. */
 	KEYC_MOUSE, /* unclassified mouse event */
 	KEYC_DRAGGING, /* dragging in progress */

tty-keys.c

@@ -165,6 +165,10 @@ static const struct tty_default_key_raw tty_default_raw_keys[] = {
 	/* Focus tracking. */
 	{ "\033[I", KEYC_FOCUS_IN },
 	{ "\033[O", KEYC_FOCUS_OUT },
+
+	/* Paste keys. */
+	{ "\033[200~", KEYC_PASTE_START },
+	{ "\033[201~", KEYC_PASTE_END },
 };
 
 /* Default terminfo(5) keys. */