Fix bug where user sockets were being chowned on server start.
Fix bug where user sockets were being chowned on server start.

Closes #6018

JanMarvin/rstudio,JanMarvin/rstudio,JanMarvin/rstudio,JanMarvin/rstudio,JanMarvin/rstudio,JanMarvin/rstudio,JanMarvin/rstudio,JanMarvin/rstudio,JanMarvin/rstudio