modified a bunch of files in /inc and /search to comment out all references to captcha, so user no longer has to supply captcha string and page no longer searches for it. A couple of dozen files modified in all which can be identified by their modification date (2022-02-08)

Also modified a couple of files in content/annotate/ to disable the form for submitting annotations to prevent it being abused when captcha disabled. I removed large whacks of the page rather than commented them out.