CLSA-2025-1749569869 libsoup: Fix of 3 CVEs

CVE-2025-46420: fix memory leaks in the soupheaderparsequalitylist - CVE-2025-32050: fix using int instead of sizet for strcspn return to avoid buffer under-read - CVE-2025-32052: fix heap buffer overflow in soupcontentsniffersniff...