* src/LaTeX.C
(LaTeX::deplog): Assume that filenames in log files are stored in
the file system encoding
* src/frontends/qt4/qt_helpers.[Ch]
(internal_path): delete
* src/frontends/qt4/QGraphics.C: Adjust to change above
* src/frontends/qt4/QPrefsDialog.C: ditto
* src/frontends/qt4/QExternal.C: ditto
* src/frontends/qt4/QInclude.C: ditto
* src/support/os.h: Document the encoding of filename arguments
* src/support/os_win32.h: ditto
* src/support/filetools.C
(findtexfile): Convert filename from file system encoding
* src/support/os_win32.C: Convert filenames from utf8 to file system
encoding and vice versa where needed
* src/support/os_cygwin.C: ditto
* src/support/getcwd.C
(getcwd): Use internal_path() with correct encoding
* src/support/docstring.[Ch]
(from_filesystem8bit): new conversion function
* src/support/environment.C
(getEnv): convert environment variable from local 8bit encoding to utf8
(setEnv): convert environment variable from utf8 to local 8bit encoding
* src/support/environment.h: document encoding of function arguments
git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@16753 a592a061-630c-0410-9148-cb99ea01b6c8
