CLSA-2023-1677095961 git: Fix of 6 CVEs

CVE-2022-41903: fix out-of-bounds write caused by integer overflow - CVE-2021-40330: forbid newlines in host and path - CVE-2022-39260: reject too long command line strings - CVE-2021-23521: implement size checks for .gitattributes - CVE-2023-22490: prevent arbitrary path exfiltration when using...