Add payloads for recent additions to os cmd execution cheatsheet

https://github.com/fuzzdb-project/fuzzdb/blob/master/attack/os-cmd-execution/README.md

Refresh the payload files for "remote command execution without strings."

These should be some of the first payloads in the payload list as they bypass a common poor input filter design, removing spaces from input, and work without a filter present, as well.