Megatest: README at [e8f9900f14]

File cgisetup/README artifact aa3039d7ba part of check-in e8f9900f14

1. copy megatest.config to cgi-bin/.megatest.config
2. edit cgi-bin/.megatest.config, change appropriate settings
3. compile mtutil and copy the mtut binary (look in the bin dir)
   to cgi-bin/megatest
4. use mtutil to populate your database schema