[G26karthik]

Closes #879

Authority::from_static("https://127.0.0.1") returns an Authority without panicking, while "https://127.0.0.1".parse::<Authority>() returns an error.

Both call validate_authority_bytes, which stops at the first /, ? or # and returns that position as the end of the authority. create_authority (used by parse) compares that position to the input length and rejects the input if there is leftover data. from_static matched on Ok(_) and threw the position away, so anything after the first /, ? or # was accepted as part of the authority.

from_static now only accepts Ok(end) when end == src.len(), so it agrees with parse and is still const.

Tests:

• Added from_static_rejects_trailing_path in src/uri/authority.rs. It fails on master (the call does not panic) and passes with this change.
• cargo test passes (422 tests). cargo fmt is not installed here, so I formatted by hand.

[G26karthik]

Closing this so the issue author can take it. Sorry for the noise.