Make the test server exhibit more interesting behavior.
Make the test server exhibit more interesting behavior.

Specifically, this commit adds multiple links on each test page.  This
means that concurrency levels > 1 will actually engage multiple workers.

Frogging101/ArchiveBot,JesseWeinstein/ArchiveBot,Asparagirl/ArchiveBot,JesseWeinstein/ArchiveBot,emijrp/ArchiveBot,emijrp/ArchiveBot,ArchiveTeam/ArchiveBot,ArchiveTeam/ArchiveBot,ArchiveTeam/ArchiveBot,ArchiveTeam/ArchiveBot,Asparagirl/ArchiveBot,Asparagirl/ArchiveBot,Frogging101/ArchiveBot,JesseWeinstein/ArchiveBot,ArchiveTeam/ArchiveBot,emijrp/ArchiveBot,falconkirtaran/ArchiveBot,falconkirtaran/ArchiveBot,Frogging101/ArchiveBot,emijrp/ArchiveBot,falconkirtaran/ArchiveBot,Frogging101/ArchiveBot,Asparagirl/ArchiveBot,Asparagirl/ArchiveBot,emijrp/ArchiveBot,JesseWeinstein/ArchiveBot,JesseWeinstein/ArchiveBot,Frogging101/ArchiveBot,falconkirtaran/ArchiveBot,falconkirtaran/ArchiveBot