CLSA-2025-1756409662 xorg-x11-server: Fix of 8 CVEs

CVE-2025-26594: refuse to free the root cursor and keep its ref - CVE-2025-26595: fix buffer overflow in XkbVModMaskText - CVE-2025-26596: xkb: fix computation of XkbSizeKeySyms - CVE-2025-26597: xkb: fix buffer overflow in XkbChangeTypesOfKey - CVE-2025-26598: Xi: Fix barrier device search -...