[geany/geany] ef3d5b: Use 'comment' named style for D nested comments

[Nick Treleaven]

  Branch: refs/heads/master
  Home:   https://github.com/geany/geany

  Commit: ef3d5b8417c92ce4b125ef614f947026be63ed9b
      https://github.com/geany/geany/commit/ef3d5b8417c92ce4b125ef614f947026be63ed9b
  Author: Nick Treleaven <nick.treleaven at btinternet.com>
  Date:   2011-12-16 (Fri, 16 Dec 2011)

  Changed paths:
    M data/filetypes.d
  M src/highlightingmappings.h

  Log Message:
  -----------
  Use 'comment' named style for D nested comments

This also fixes a wrong style key name for filetypes.d.
(Nested comments aren't necessarily doc-comments).