Improve wording in /etc/profile

/etc/profile says:

# The default umask is now handled by pam_umask.
# See pam_umask(8) and /etc/login.defs.

The above can be shortened, as pam_umask(8) refers to /etc/login.defs. This also avoids the reader inferring (as I did) that /etc/login.defs is independent of pam_umask, an inference which though erroneous is supported by the fact that the umask stanza in /etc/login.defs does not mention pam_umask.

I suggest rewriting the lines above as:

# The default umask is handled by pam_umask.
# See pam_umask(8).

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: base-files 6.5ubuntu6
ProcVersionSignature: Ubuntu 3.2.0-26.41-generic 3.2.19
Uname: Linux 3.2.0-26-generic x86_64
ApportVersion: 2.0.1-0ubuntu11
Architecture: amd64
Date: Mon Jul 23 23:06:16 2012
Dependencies:

InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110427.1)
SourcePackage: base-files
UpgradeStatus: Upgraded to precise on 2012-03-06 (139 days ago)