Revert "support search= param"

This reverts commit 6c779ef5d1783f1e4cbd7abdd17f0a025fd0c767.
Revert "Revert "support search= param""

This reverts commit 4d297b244ac2d42c8255f9e06a88644da8d3b515.
repair title=; add decoration=plain
parameterize site name (&site=atlas, for example)