Implementing a patch from Jocelyn Frechot (thank you, Jocelyn) that "should enable...

[freeglut] / doc / Makefile.am

EXTRA_DIST = \
        download.html freeglut.html freeglut_logo.png \
        freeglut_user_interface.html index.html \
        ogl_sm.png progress.html structure.html