vagrant: use nfsv3 even if nfsv4 is available (for native ACL support)
vagrant: use nfsv3 even if nfsv4 is available (for native ACL support)

JanMarvin/rstudio,jar1karp/rstudio,jar1karp/rstudio,piersharding/rstudio,JanMarvin/rstudio,JanMarvin/rstudio,jrnold/rstudio,jrnold/rstudio,jrnold/rstudio,JanMarvin/rstudio,jar1karp/rstudio,jrnold/rstudio,piersharding/rstudio,JanMarvin/rstudio,jar1karp/rstudio,jar1karp/rstudio,jrnold/rstudio,piersharding/rstudio,jrnold/rstudio,piersharding/rstudio,piersharding/rstudio,JanMarvin/rstudio,piersharding/rstudio,piersharding/rstudio,jrnold/rstudio,jrnold/rstudio,jar1karp/rstudio,jar1karp/rstudio,JanMarvin/rstudio,JanMarvin/rstudio,jrnold/rstudio,JanMarvin/rstudio,piersharding/rstudio,piersharding/rstudio,jar1karp/rstudio,jar1karp/rstudio