Log Message:
Update mlterm to 3.3.0.

pkgsrc changes:

 - remove obsolete post-3.2.2 fixes
 - adjust patches per changes in original files

Changes from doc/en/ReleaseNote:

ver 3.3.0
* Support framebuffer on NetBSD/x68k. (Thanks to NetBSD/x68k developers)
* Support Android. (Experimental)
* Update the colormap instead of searching the closest color when
  OSC 4 ; c ; spec changes RGB of the color number on framebuffer.
* Support OSC ? 80 h (disable sixel scrolling).
* Support U+XXXX-XXXX key in 'font' configuration file.
* Add "unicode_noconv_areas" (a.k.a --ucsnoconv) option.
* Add "allow_scp" (a.k.a --scp) option.
* Remove SWITCH_OSC52. (Use "proto:allow_osc52=switch" instead.)
* OSC 5383 reqests challenge sequence.
* Bug fixes:
  #70 (Thanks to Thomas Wolff)
  Fix the bug which disabled redrawing the margin area on framebuffer.
  Fix the bug of the transparent color of sixel graphics on win32.
  OSC 4 has an effect on RGB of the window background color.
  Send a sixel next line character (-) following a sixel dump.
  Fix the bug which disabled Mod+XXX shortcut key settings on win32.
  Fix the bug which erased the end character of each line in scrolling if DECSLRM
  set the right margin at the right end is fixed.
  Fix the bug of DL/IL which scrolled the screen instead of inserting or deleteing
  lines from the cursor position.
  Fix keypad '5' key (VK_CLEAR) on win32.
  Fix the bug of ignoring the next character after sixel graphics data.
  Fix the bug which makes the window smaller than necessary in resizing.
  Support wsdisplay of the BBGGRR format on NetBSD/OpenBSD. (Thanks to @oshimyja san)