glhtWithMCP.993: Retain averaging behavior that was previously available in glht.
Description
For some ANOVA models with two or more factors, we need to average over
  interaction terms.  These functions use an older version of glht.mcp
  and mcp2matrix to do that averaging.Usage
glhtWithMCP.993(model, linfct, ...)
mcp2matrix.993(model, linfct)
Details
mcp2matrix is taken from from multcomp_0.993-2.tar.gz/R/mcp.R.
glhtWithMCP.993 is based on glht.mcp in
multcomp_1.0-0/R/glht.R
with the call to mcp2matrix replaced by a call to mcp2matrix.993.