Move IPAddr to deafult gems category.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64267 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

doc/maintainers.rdoc

@@ -60,8 +60,6 @@ Zachary Scott (zzak)
   Kazuki Tsujimoto (ktsj)
 [lib/getoptlong.rb]
   _unmaintained_
-[lib/ipaddr.rb]
-  Akinori MUSHA (knu)
 [lib/mkmf.rb]
   _unmaintained_
 [lib/monitor.rb]
@@ -193,6 +191,8 @@ Zachary Scott (zzak)
   https://github.com/ruby/fileutils
 [lib/forwardable.rb]
   Keiju ISHITSUKA (keiju)
+[lib/ipaddr.rb]
+  Akinori MUSHA (knu)
 [lib/irb.rb, lib/irb/*]
   Keiju ISHITSUKA (keiju)
 [lib/logger.rb]

doc/standard_library.rdoc

@@ -19,7 +19,6 @@ English.rb:: Require 'English.rb' to reference global variables with less crypti
 ERB:: An easy to use but powerful templating system for Ruby
 Find:: This module supports top-down traversal of a set of file paths
 GetoptLong:: Parse command line options similar to the GNU C getopt_long()
-IPAddr:: Provides methods to manipulate IPv4 and IPv6 IP addresses
 MakeMakefile:: Module used to generate a Makefile for C extensions
 Monitor:: Provides an object or module to use safely by more than one thread
 Net::FTP:: Support for the File Transfer Protocol
@@ -81,6 +80,7 @@ CSV:: Provides an interface to read and write CSV files and data
 E2MM:: Module for defining custom exceptions with specific messages
 FileUtils:: Several file utility methods for copying, moving, removing, etc
 Forwardable:: Provides delegation of specified methods to a designated object
+IPAddr:: Provides methods to manipulate IPv4 and IPv6 IP addresses
 IRB:: Interactive Ruby command-line tool for REPL (Read Eval Print Loop)
 Logger:: Provides a simple logging utility for outputting messages
 Matrix:: Represents a mathematical matrix.