I checked out SVN 803 to play around with compiling and stuff. Just to see if I could I updated GLEW to 2.1.0. Everything seems to run fine.
The copyright notice on the version of GLEW in the SVN 803 project is dated 2008 so I assume that version is 1.5.1
That version note is:
[11-03-08] GLEW 1.5.1 adds support for OpenGL 3.0 and 31 new extensions
This new version note:
[07-31-17] GLEW 2.1.0 adds support for OpenGL 4.6, new extensions and minor bug fixes