xterm version check

gistfile1.txt

vim
        >= 95   button-event mouse
        >= 141  request termcap/terminfo string
        >= 277  sgr-mouse
Emacs (xterm.el)
        >= 216  modifyOtherKeys
        >= 242  query background color
MinEd
        >= 251  title stack
        >= 210  UTF-8 title
        >= 201  Latin-1 title
        >= 252  title mode
        <  154  ! can_erase_chars
        >= 216  modifyOtherKeys
        >= 277  rxvt-mouse
        >= 262  utf8-mouse
        == 224  ! use_mouse_hilite_tracking
        <  122  meta sets eightbit (DECSET 1034)
        >= 122  meta sends escape (DECSET 1036)
                Save/Restore DECMODE
                Delete key sends DEL (DECSET 1037)
        >= 203  font size change
        >= 90   enhanced alternate screen (DECSET 1049)