Modernize freebsd-tips a bit

- Prefer UTF-8 over ISO-8859-1
- Remove some references to printing man pages
- Combine duplicate '!!' tips
- 'rehash' is no longer needed

usr.bin/fortune/datfiles/freebsd-tips

@@ -47,10 +47,6 @@ reinstall it with gpart(8). See
 If you accidentally end up inside vi, you can quit it by pressing Escape, colon
 (:), q (q), bang (!) and pressing return.
 %
-If you are in the C shell and have just installed a new program, you won't
-be able to run it unless you first type "rehash".
-		-- Dru <genesis@istar.ca>
-%
 If you do not want to get beeps in X11 (X Windows), you can turn them off with
 
 	xset b off
@@ -115,7 +111,7 @@ also do a lot more advanced searches - type 'man grep' for details.
 %
 In order to support national characters for European languages in tools like
 less without creating other nationalisation aspects, set the environment
-variable LC_ALL to 'en_US.ISO8859-1'.
+variable LC_ALL to 'en_US.UTF-8'.
 %
 "man firewall" will give advice for building a FreeBSD firewall using ipfw(8).
 		-- David Scheidt <dscheidt@tumbolia.com>
@@ -154,11 +150,6 @@ Use "lock -p". When you return, use your password as the key to unlock the
 terminal.
 		-- Dru <genesis@istar.ca>
 %
-Need to print a manpage? Use
-
-	man name_of_manpage | col -bx | lpr
-		-- Dru <genesis@istar.ca>
-%
 Need to quickly empty a file? Use ": > filename".
 		-- Dru <genesis@istar.ca>
 %
@@ -256,9 +247,6 @@ To read a compressed file without having to first uncompress it, use
 and "xzless".
 		-- Dru <genesis@istar.ca>
 %
-To repeat the last command in the C shell, type "!!".
-		-- Dru <genesis@istar.ca>
-%
 To save disk space in your home directory, compress files you rarely
 use with "gzip filename".
 		-- Dru <genesis@istar.ca>
@@ -467,7 +455,7 @@ Try "whereis firefox" and "whereis whereis".
 		-- Konstantinos Konstantinidis <kkonstan@duth.gr>
 %
 Want to run the same command again?
-In tcsh you can type "!!".
+Type "!!".
 %
 Want to go the directory you were just in?
 Type "cd -"