Security update for MozillaThunderbird

This update for MozillaThunderbird fixes the following issues: - Mozilla Thunderbird was updated to version 78.9.1 (MFSA 2021-12,MFSA 2021-13, bsc#1183942, bsc#1184536) * CVE-2021-23981: Texture upload into an unbound backing buffer resulted in an out-of-bound read * CVE-2021-23982: Internal network hosts could have been probed by a malicious webpage * CVE-2021-23984: Malicious extensions could have spoofed popup information * CVE-2021-23987: Memory safety bugs * CVE-2021-23991: An attacker may use Thunderbird's OpenPGP key refresh mechanism to poison an existing key * CVE-2021-23992: A crafted OpenPGP key with an invalid user ID could be used to confuse the user * CVE-2021-23993: Inability to send encrypted OpenPGP email after importing a crafted OpenPGP key - cleaned up and fixed mozilla.sh.in for wayland (bsc#1177542) This update was imported from the SUSE:SLE-15-SP2:Update update project.