o all: use "critical" to avoid duplicated command dispatch
o http.rb: change get2, post2 usage (HTTPWriter)
o http.rb: entity reading algorithm is better
o http.rb: more reply code (4xx, 5xx)
o protocol.rb: arguments of "connect" can be omitted
o protocol.rb: "quit" is not template method (now do_quit is removed)
o protocol.rb: ReplyCode.error_type was not work: using module_eval
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@657 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
o smtp.rb: arguments discription of do_ready was wrongly void
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@654 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
o all: use 'attr_reader/writer' instead of 'attr'
o http.rb: get/head allow implicit 'start'
o http.rb: change connection state algorithm
o http.rb: process user header before write
o protocol.rb: refine start/finish
o protocol.rb: Command#last_reply
o protocol.rb: ReplyCode.error!
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@631 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
o write, write_pendstr takes block
o smtp.ready
o popmail.pop takes block
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@622 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
