Add File Safe Regex to Profile Filename

[fresh-eggs]

This PR aims to add a regex which will enforce an allowed list of characters on the profile filenames generated by the App Profiler.

app_profiler/lib/app_profiler/profile.rb

Lines 66 to 77 in 4d4ed61

	def path
	filename = [
	Time.zone.now.strftime("%Y%m%d-%H%M%S"),
	mode,
	id,
	Socket.gethostname,
	].compact.join("-") << ".json"
	raise UnsafeFilename if /[^0-9A-Za-z.\-\_]/.match(filename)
	AppProfiler.profile_root.join(filename)
	end

The regex [^0-9A-Za-z.\-\_], attempts to match on any character not included in alphanumerics, ., - or _.

[dalehamel]

thanks @fresh-eggs