delete disconnected clients from cache
remove duplicate client delete

Good lord how stupid was that. Today I shall wear a new deodorant called
Shame.
log websocket errors to browser console
Filter rooms list on frontpage: hide non-links
Thumbnails for sites in list
Fetching site thumbnail runtime configurable
locking on runtime params
Manage runtime params through /config
Password-protect admin panel (/config)
cache name
focus input on maximizing
reorganize CSS
More accurate errmsg on HTML template error
More informative landing page
refactoring
show connection state to user
color connection errors red
use custom backlog datastructure
rename safeuint.go
write timeout for websocket clients