`require "webrick/utils.rb"` should load `lib/webrick/utils.rb`, but on
some CI machines, it wrongly loads `test/webrick/utils.rb`, which caused
circular require warning:
https://rubyci.org/logs/rubyci.s3.amazonaws.com/ubuntu/ruby-master/log/20190825T093007Z.log.html.gz
```
/data/chkbuild/tmp/build/20190825T093007Z/ruby/lib/rubygems/core_ext/kernel_require.rb:61: warning: /data/chkbuild/tmp/build/20190825T093007Z/ruby/lib/rubygems/core_ext/kernel_require.rb:61: warning: loading in progress, circular require considered harmful - /data/chkbuild/tmp/build/20190825T093007Z/ruby/lib/webrick.rb
```
When you change this to true, you may need to add more tests.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@53141 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Based on patch by @chastell https://github.com/ruby/ruby/pull/413
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43150 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* lib/webrick/httpproxy.rb: Add examples of creating a proxy server
and response rewriting using HTTPProxy.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@34424 b2dd03c8-39d4-4d8f-98ff-823fe69b080e