Make wget convert HTML links to relative after download if -k wasn't specified
Solution 1:
Yes, you can make wget do it. I'd say use wget -nc -k [previous options] [previous url]. -nc is no-clobber. From the man page:
When
−ncis specified, this behavior is suppressed, and Wget will refuse to download newer copies of file.
And the -k option does the link converting. So, wget starts digging in the remote server, sees all the files you already have, refuses to redownload them, and then edits the HTML links to relative when it's done. Nice.