treewide: Per RFC45, remove all unquoted URLs

pkgs/development/libraries/libmkv/default.nix

@@ -5,7 +5,7 @@ stdenv.mkDerivation rec {
   version = "0.6.5.1";
 
   src = fetchgit {
-    url = https://github.com/saintdev/libmkv.git;
+    url = "https://github.com/saintdev/libmkv.git";
     rev = "refs/tags/${version}";
     sha256 = "0pr9q7yprndl8d15ir7i7cznvmf1yqpvnsyivv763n6wryssq6dl";
   };
@@ -20,7 +20,7 @@ stdenv.mkDerivation rec {
       Library was meant to be an alternative to the official libmatroska library.
       It is written in plain C, and intended to be very portable.
     '';
-    homepage = https://github.com/saintdev/libmkv;
+    homepage = "https://github.com/saintdev/libmkv";
     license = stdenv.lib.licenses.gpl2;
     maintainers = [ stdenv.lib.maintainers.wmertens ];
     platforms = stdenv.lib.platforms.unix;