treewide: Per RFC45, remove all unquoted URLs

pkgs/applications/misc/keepassx/2.0.nix

@@ -13,7 +13,7 @@ stdenv.mkDerivation rec {
 
   meta = {
     description = "Qt password manager compatible with its Win32 and Pocket PC versions";
-    homepage = https://www.keepassx.org/;
+    homepage = "https://www.keepassx.org/";
     license = stdenv.lib.licenses.gpl2;
     maintainers = with stdenv.lib.maintainers; [ qknight ];
     platforms = with stdenv.lib.platforms; linux;

pkgs/applications/misc/keepassx/community.nix

@@ -114,7 +114,7 @@ stdenv.mkDerivation rec {
   meta = {
     description = "Password manager to store your passwords safely and auto-type them into your everyday websites and applications";
     longDescription = "A community fork of KeePassX, which is itself a port of KeePass Password Safe. The goal is to extend and improve KeePassX with new features and bugfixes to provide a feature-rich, fully cross-platform and modern open-source password manager. Accessible via native cross-platform GUI, CLI, and browser integration with the KeePassXC Browser Extension (https://github.com/keepassxreboot/keepassxc-browser).";
-    homepage = https://keepassxc.org/;
+    homepage = "https://keepassxc.org/";
     license = licenses.gpl2;
     maintainers = with maintainers; [ jonafato ];
     platforms = platforms.linux ++ platforms.darwin;

pkgs/applications/misc/keepassx/default.nix

@@ -17,7 +17,7 @@ stdenv.mkDerivation rec {
 
   meta = {
     description = "Qt password manager compatible with its Win32 and Pocket PC versions";
-    homepage = https://www.keepassx.org/;
+    homepage = "https://www.keepassx.org/";
     license = stdenv.lib.licenses.gpl2;
     maintainers = with stdenv.lib.maintainers; [ qknight ];
     platforms = with stdenv.lib.platforms; linux;