monitor: rename keyname '<' to 'less'

There are many maps of keycode 0x56 in pc-bios/keymaps/*
  pc-bios/keymaps/common:less 0x56
  pc-bios/keymaps/common:greater 0x56 shift
  pc-bios/keymaps/common:bar 0x56 altgr
  pc-bios/keymaps/common:brokenbar 0x56 shift altgr

This patch just renamed '<' to 'less', QAPI might add new
variable by adding a prefix to keyname, '$PREFIX_<' is not
available, '$PREFIX_less' is ok.

For compatibility, convert user inputted '<' to 'less'.

Signed-off-by: Amos Kong <akong@redhat.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>

monitor.c

@@ -1400,7 +1400,7 @@ static const KeyDef key_defs[] = {
     { 0x48, "kp_8" },
     { 0x49, "kp_9" },
 
-    { 0x56, "<" },
+    { 0x56, "less" },
 
     { 0x57, "f11" },
     { 0x58, "f12" },
@@ -1504,6 +1504,13 @@ static void do_sendkey(Monitor *mon, const QDict *qdict)
                 monitor_printf(mon, "too many keys\n");
                 return;
             }
+
+            /* Be compatible with old interface, convert user inputted "<" */
+            if (!strncmp(keyname_buf, "<", 1) && keyname_len == 1) {
+                pstrcpy(keyname_buf, sizeof(keyname_buf), "less");
+                keyname_len = 4;
+            }
+
             keyname_buf[keyname_len] = 0;
             keycode = get_keycode(keyname_buf);
             if (keycode < 0) {