Do these broken clients still exist?

[Joshua Slive]

Does someone with a high-traffic, general-interest web site want to take a 
look through their logs for these user-agent strings.  I don't mind 
keeping them if they make up even 1/100 of a percent of the trafic, but it 
seems silly to keep these extra regexes on every single request if these 
clients don't exist anymore in the wild.

    #
    # The following directives modify normal HTTP response behavior to
    # handle known problems with browser implementations.
    #
    BrowserMatch "Mozilla/2" nokeepalive
    BrowserMatch "MSIE 4\.0b2;" nokeepalive downgrade-1.0 force-response-1.0
    BrowserMatch "RealPlayer 4\.0" force-response-1.0
    BrowserMatch "Java/1\.0" force-response-1.0
    BrowserMatch "JDK/1\.0" force-response-1.0
Joshua.