More radare 2 (4/?): filter and search


## Output filtering: see ~?

~ follows a command, to massage the output of it.
let `ia` be our command)
Notable variants:
 ~..         pager
 ~{path}     json
Examples:
 izz~..
 izj~{[0].vaddr}


## Searching in binary: see /?

Notable variants:
 /c    search for crypto material
Should investigate on what is available

Would it be possible to find traces of a statically compiled library (possibly
even multiple copies of it) within an executable?