Server: Use max/min for language parsing

rather than clamp. This allows us to compile on stable

src/i18n.rs

@@ -102,7 +102,7 @@ fn parse_accept_language(s: &str) -> Vec<LanguageIdentifier> {
             let quality = lang_iter.next();
 
             let quality_value: f32 = if let Some(quality) = quality {
-                quality.parse::<f32>().ok()?.clamp(0.0f32, 1.0f32)
+                quality.parse::<f32>().ok()?.max(0.0f32).min(1.0f32)
             } else {
                 1.0f32
             };