Minor enhancement for core/development/i386/RELEASE-NOTES-en.html

[Laurent GUERBY]

The release notes take great care to define all acronyms, however
it looks like one got through:

<<
Q:

What is SELinux?

A:

SELinux (Security-Enhanced Linux) in Fedora Core is an implementation of
Mandatory Access Control (MAC) in the Linux kernel using LSM.
>>

LSM is not explained, google says Linux Security Module
<http://lsm.immunix.org/>.

Laurent