Update to revision 4.2.

Move BROKEN line higher to fix portlint warning.

Change OpenEXR from build and run depend to lib depend.

Remove lib depend on boost-libs and --with-boost-filesystem. Boost is now only
a build depend. From NEWS:

• Support of the Boost filesystem library has been dropped. There is no Boost library dependence anymore.

Remove USE_GL. From NEWS:

• Support for OpenGL acceleration has been dropped. So, the dependencies on the libraries GL, GLU, and Glut do not exist any longer.

Add pkgconfig to USES to fix configure warning.

Info files are no longer included in distfile. Remove installation of info
files and makeinfo from USES.

The LaTeX documentation is currently disabled. It was never able to be
successfully built after several days of trying.

PR: 236073
Submitted by: Darren Mulligan
Reported by: Darren Mulligan
MFC after: 2 weeks