patch 8.2.2383: focus escape sequences are not named

Problem:    Focus escape sequences are not named in ":set termcap" output.
Solution:   Add the names to the list. (closes #7718)

src/misc2.c

@@ -2531,6 +2531,8 @@ static struct key_name_entry
     {K_CURSORHOLD,	(char_u *)"CursorHold"},
     {K_IGNORE,		(char_u *)"Ignore"},
     {K_COMMAND,		(char_u *)"Cmd"},
+    {K_FOCUSGAINED,	(char_u *)"FocusGained"},
+    {K_FOCUSLOST,	(char_u *)"FocusLost"},
     {0,			NULL}
     // NOTE: When adding a long name update MAX_KEY_NAME_LEN.
 };

src/version.c

@@ -750,6 +750,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    2383,
 /**/
     2382,
 /**/