Defines starting with `b' in quake2

• BACKFACE_EPSILON 321/ref_soft/r_local.h:218
• BASEDIRNAME 321/qcommon/qcommon.h:28
• BBOX_MUST_CLIP_XY 321/ref_soft/r_alias.c:91
• BBOX_MUST_CLIP_Z 321/ref_soft/r_alias.c:92
• BBOX_TRIVIAL_ACCEPT 321/ref_soft/r_alias.c:90
• BBOX_TRIVIAL_REJECT 321/ref_soft/r_alias.c:93
• BEAMLENGTH 321/client/cl_fx.c:1818
• BLOCK_HEIGHT 321/ref_gl/gl_image.c:360
• BLOCK_WIDTH 321/ref_gl/gl_image.c:359
• BMODEL_FULLY_CLIPPED 321/ref_soft/r_local.h:210
• BODY_QUEUE_SIZE 321/ctf/g_local.h:85
• BSPVERSION 321/qcommon/qfiles.h:222
• bufptr 321/linux/d_copy.s:16
• BUILDSTRING 321/qcommon/qcommon.h:33