This makes gotwebd use SCRIPT_NAME instead of the DOCUMENT_ROOT fastcgi param to generate the links to the assets and changes some links so every page is consistently linked with a relative URL. It allows to drop the `root "/"' in the location for fastcgi and, as a bonus, also makes possible to run gotwebd on non "/" paths. ok stsp@

ok stsp@

ok op@

We already have two arguments when diffing two blobs, so check for more than two like we do when diffing two objects to check for invalid path args. Includes new regress test by op for diffing two blobs. ok stsp@ and ok plus regress test from op@

We want to check if *nlines is greater than zero here. ok op@ and stsp@

Patch by Josiah Frentsos; ok kn@

tracey is fine with gotwebd.8 but gotweb.conf.5 still needs some work

ok tracey