Improve cacheing

Caches domain/a and author.domain/a as the same page.

src/lua/cache.lua

@@ -17,6 +17,7 @@ local stmnt_cache, stmnt_insert_cache, stmnt_dirty_cache
 local oldconfigure = configure
 function configure(...)
 	local cache = util.sqlassert(sql.open_memory())
+	ret.cache = cache -- Expose db for testing
 	--A cache table to store rendered pages that do not need to be
 	--rerendered. In theory this could OOM the program eventually and start
 	--swapping to disk. TODO: fixme

src/lua/endpoints/read_get.lua

@@ -1,4 +1,4 @@
-local sql = require("sqlite3")
+local sql = require("lsqlite3")
 
 local session = require("session")
 local tags = require("tags")
@@ -151,7 +151,6 @@ local function read_get(req)
 			table.insert(params,"pwd=" .. hashstr)
 		end
 		local cachestrparts = {
-			ps.host,
 			ps.path,
 		}
 		if #params > 0 then