This removes URLParser, because its two exposed functions, urlencode()
and urldecode(), have been superseded by URL::percent_encode() and
URL::percent_decode(). This is in preparation for the introduction of a
new URL parser.
SPDX License Identifiers are a more compact / standardized
way of representing file license information.
See: https://spdx.dev/resources/use/#identifiers
This was done with the `ambr` search and replace tool.
ambr --no-parent-ignore --key-from-file --rep-from-file key.txt rep.txt *
