fix: Improve URL compatibility (#6807)

- Fix protocol regex.
- Truncate repeated leading slashes in file paths.
- Make drive letter support platform-independent.
- Drop the hostname if a drive letter is parsed.
- Fix drive letter normalization and basing.
- Allow basing over the host.
- Fix same-protocol basing.
- Remove Windows UNC path support.
- Reverts #6418. This is non-standard. Wouldn't be too much of a problem but it 
   makes other parts of the spec hard to realize.

1 files changed, 2 insertions, 1 deletions

diff --git a/std/path/posix.ts b/std/path/posix.ts
index 03d07a84a..3c4262203 100644
--- a/std/path/posix.ts
+++ b/std/path/posix.ts
@@ -435,5 +435,6 @@ export function parse(path: string): ParsedPath {
  * are ignored.
  */
 export function fromFileUrl(url: string | URL): string {
-  return new URL(String(url)).pathname;
+  return (url instanceof URL ? url : new URL(url)).pathname
+    .replace(/^\/*([A-Za-z]:)(\/|$)/, "$1/");
 }