Make code more portable + remove mcookie usage

Signed-off-by: AnErrupTion <anerruption@disroot.org>

src/config/Config.zig

@@ -28,7 +28,6 @@ lang: []const u8 = "en",
 load: bool = true,
 margin_box_h: u8 = 2,
 margin_box_v: u8 = 1,
-mcookie_cmd: [:0]const u8 = build_options.prefix_directory ++ "/bin/mcookie",
 min_refresh_delta: u16 = 5,
 numlock: bool = false,
 path: ?[:0]const u8 = "/sbin:/bin:/usr/local/sbin:/usr/local/bin:/usr/bin:/usr/sbin",

src/config/Lang.zig

@@ -12,7 +12,6 @@ err_dgn_oob: []const u8 = "log message",
 err_domain: []const u8 = "invalid domain",
 err_envlist: []const u8 = "failed to get envlist",
 err_hostname: []const u8 = "failed to get hostname",
-err_mcookie: []const u8 = "mcookie command failed",
 err_mlock: []const u8 = "failed to lock password memory",
 err_null: []const u8 = "null pointer",
 err_pam: []const u8 = "pam transaction failed",

src/config/migrator.zig

@@ -62,7 +62,8 @@ pub fn configFieldHandler(_: std.mem.Allocator, field: ini.IniField) ?ini.IniFie
     if (std.mem.eql(u8, field.key, "wayland_specifier") or
         std.mem.eql(u8, field.key, "max_desktop_len") or
         std.mem.eql(u8, field.key, "max_login_len") or
-        std.mem.eql(u8, field.key, "max_password_len"))
+        std.mem.eql(u8, field.key, "max_password_len") or
+        std.mem.eql(u8, field.key, "mcookie_cmd"))
     {
         // The options don't exist anymore
         mapped_config_fields = true;