Bug 701754: Check 'uniXXXX' glyph name length to avoid false matches.
Bug 701754: Check 'uniXXXX' glyph name length to avoid false matches.

A prefix of 'uni' is not sufficient, as evidenced by the file attached
in the bug report. Reject glyph names that start with uni but are not
7 characters long, to allow us to fall back to other last resort
approaches to encoding/decoding text.

In the example file we'll encode these glyphs as U+FFFD replacement
character, since we cannot find a good encoding for them.

ArtifexSoftware/mupdf,sebras/mupdf,TamirEvan/mupdf,TamirEvan/mupdf,fluks/mupdf-x11-bookmarks,ArtifexSoftware/mupdf,ccxvii/mupdf,TamirEvan/mupdf,sebras/mupdf,fluks/mupdf-x11-bookmarks,sebras/mupdf,fluks/mupdf-x11-bookmarks,sebras/mupdf,ArtifexSoftware/mupdf,ccxvii/mupdf,ccxvii/mupdf,TamirEvan/mupdf,ArtifexSoftware/mupdf,TamirEvan/mupdf,fluks/mupdf-x11-bookmarks,ArtifexSoftware/mupdf,fluks/mupdf-x11-bookmarks,TamirEvan/mupdf,ccxvii/mupdf,ccxvii/mupdf,ArtifexSoftware/mupdf,ArtifexSoftware/mupdf,TamirEvan/mupdf,sebras/mupdf,fluks/mupdf-x11-bookmarks,ccxvii/mupdf,sebras/mupdf,TamirEvan/mupdf,fluks/mupdf-x11-bookmarks,ArtifexSoftware/mupdf