Whether url is a valid target for a single-bracket link ([url label]).
Matches Text_Wiki's described-URL rule (regexLiberal): a site-relative path
(/…) or any recognized URL scheme (http/https/ftp/gopher/news/mms/mailto).
Kept in sync with the autolink rule so bracket-described links and bare
auto-links accept the same schemes.
Whether
urlis a valid target for a single-bracket link ([url label]).Matches Text_Wiki's described-URL rule (regexLiberal): a site-relative path (
/…) or any recognized URL scheme (http/https/ftp/gopher/news/mms/mailto). Kept in sync with the autolink rule so bracket-described links and bare auto-links accept the same schemes.