Fixes from the stable branch:

* include/freetype/config/ftoption.h (FT_CONFIG_OPTION_OLD_CALCS):
Removed.
[FT_CONFIG_OPTION_OLD_CALCS]: Removed.
* include/freetype/internal/ftcalc.h, src/base/ftcalc.c
[FT_CONFIG_OPTION_OLD_CALCS]: Removed.

* src/base/fttrigon.c (FT_Vector_Length): Change algorithm to match
output of FreeType 1.

* src/pshinter/pshglob.c (psh_globals_scale_widths): Fixed a small
bug that created un-even stem widths when hinting Postscript fonts.

formatting, updating copyright