Add name of unknown error instead of generic string

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

src/config/Lang.zig

@@ -44,7 +44,6 @@ err_perm_user: []const u8 = "failed to downgrade user permissions",
 err_pwnam: []const u8 = "failed to get user info",
 err_sleep: []const u8 = "failed to execute sleep command",
 err_tty_ctrl: []const u8 = "tty control transfer failed",
-err_unknown: []const u8 = "an unknown error occurred",
 err_user_gid: []const u8 = "failed to set user GID",
 err_user_init: []const u8 = "failed to initialize user",
 err_user_uid: []const u8 = "failed to set user UID",

src/main.zig

@@ -962,6 +962,6 @@ fn getAuthErrorMsg(err: anyerror, lang: Lang) []const u8 {
         error.PamSystemError => lang.err_pam_sys,
         error.PamUserUnknown => lang.err_pam_user_unknown,
         error.PamAbort => lang.err_pam_abort,
-        else => lang.err_unknown,
+        else => @errorName(err),
     };
 }