streamlets: fix command name collisions, do not prepend $RELPIPE_IN_FILESYSTEM_STREAMLET_PATH to the $PATH (a streamlet may call a command with the same name as the streamlet name, which will lead unwanted recursion)

syntax: glob

*~
CMakeLists.txt.user

syntax: regexp

^temp/

^\.dep\.inc
^dist/
^build/
^nbproject/private/