Security update for mutt

This update for mutt fixes the following issues CVE-2026-43859: strfcpy used instead of memcpy for the IMAP authcram MD5 digest bsc1263897. CVE-2026-43860: truncation of hashpasswd by one byte for IMAP authcram MD5 digest bsc1263896. CVE-2026-43861: missing check for \0 in urlpctdecode bsc1263895...