Fixes regex to match beginnig of IP address (#2900)

The BadBotConfigLine class spits out sample apache configuration based to block certain IP
address blocks based on their frequency in the apache log. The regex in the script was
erroneously matching octet pairs to any part of the clients IP to flag it as a bad bot.
This PR fixes the regex to only match the beginning

Fixes #2899

scripts/lib/apache_log_parser.rb

@@ -120,7 +120,7 @@ def to_s
     indent + ips.map do |ip|
       ip += '.' if ip.count('.') < 3
       ip.gsub!('.', '\.')
-      "SetEnvIfNoCase Remote_Addr \"#{ip}\" bad_bot"
+      "SetEnvIfNoCase Remote_Addr \"^#{ip}\" bad_bot"
     end.join("\n#{indent}")
   end
 end