Be much more paranoid about where uudecode writes its output, especially

Be much more paranoid about where uudecode writes its output, especially
when the filename comes from the untrusted input. This is a work-around
for careless people who don't routinely check the begin line of the file
or run uudecode -i and instead report "vulnerabilities" to CERT.
	http://www.kb.cert.org/vuls/id/336083