Add netbsd to the list of platforms supported.
ToDo: add info to the User's Guide once the Shiny New Documentation is
committed.
memory, GNU C (`gcc'), `perl' plus a version of GHC installed (3.02 at
least). This release is known to work on the following platforms:
- * i386-unknown-{linux,solaris2,freebsd,cygwin32}
+ * i386-unknown-{linux,solaris2,freebsd,netbsd,cygwin32}
* sparc-sun-{sunos4,solaris2}
* hppa1.1-hp-hpux{9,10}