[Bug 1270647] Re: Remove WenQuanYi as preferred font for 69-language-selector-zh-{hk, mo}.conf

[Abel Cheung]

The bug 1173571 is about using which font as default for zh-tw, but all
of the fonts discussed there have more or less complete coverage for zh-
tw. Here I'm talking about font *not* complete for zh-hk but pretend to
be so. And yes, I do wish WenQuanYi be removed as title.

> Should it be removed from both sans-serif and monospace?
Yes

> Did you intentionally not mention zh-tw?
That's correct, the font support for zh-tw and zh-hk are quite different. WenQuanYi has more or less complete support for zh-tw.

> Are we at all using zh-mo in Ubuntu, btw?
Not absolutely sure, though my suspicion is no. Same goes for zh-sg. 

> What about simplified Chinese?
WenQuanYi is intended for simplified Chinese support since day one. Keeping the status quo would be better for mainland Chinese users.

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Title:
  Remove WenQuanYi as preferred font for 69-language-selector-
  zh-{hk,mo}.conf

Status in “language-selector” package in Ubuntu:
  Incomplete

Bug description:
  Currently the only font in Ubuntu supporting (or close enough) Hong
  Kong Supplementary Character Set is Uming HK. WenQuanYi was claiming
  it supports zh-hk, but in reality it is done with fontconfig
  deceiving.

  In HKSCS charset definition dated 2004, there are 4941 characters.
  Somehow, fontconfig only checks less than half of them, around 2213 or
  so. WenQuanYi Zen Hei included only those checked glyphs in fontconfig
  to claim it's done (at least according to the latest published version
  dated 2010-03-12). In particular, there should have been around 1700
  characters in CJK extension B. WenQuanYi only has one single glyph in
  this range, which is also exactly the only one checked by fontconfig
  for zh-hk support.

  In contract, UMing HK includes 4940 out of the 4941 glyphs.

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