Trim 0x0 characters & display error message

Signed-off-by: Alexey Yerin <yerinalexey98fd@gmail.com>

src/error.rs

@@ -14,7 +14,7 @@ pub enum TaurusError {
     #[error("failed parse certificate: {0:#?}")]
     InvalidCertificate(#[from] native_tls::Error),
 
-    #[error("invalid request")]
+    #[error("invalid request: {0}")]
     InvalidRequest(String),
 
     #[error("failed to bind: {0}")]

src/gemini.rs

@@ -29,6 +29,7 @@ impl FromStr for GeminiRequest {
     fn from_str(s: &str) -> TaurusResult<Self> {
         // Extract and parse the url from the request.
         let raw = s
+            .trim_end_matches(0x0 as char)
             .strip_suffix("\r\n")
             .ok_or_else(|| TaurusError::InvalidRequest("malformed request".into()))?;
         let url = Url::parse(&raw)