Port configure script to C99

Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild

Rebuilt for https://fedoraproject.org/wiki/Fedora_37_Mass_Rebuild

New GCT release v6.2.20220524
Drop patches included in the release

Fix a double free

Support both SHA1 (backward compatibility) and SHA256 (compatible with

Partially revert the sha256 patch to restore backward compatibility

Fix wrong name in myproxy-store -V output
Use write+rename when changing passphrase
Improve detection of an encrypted private key

Fix IPv6 glitch in the trust root retrieval in the client
Drop the patch reverting the use of the -l flag in myproxy-test

Use sha256 when signing request
Fix some compiler warnings

Rebuilt for https://fedoraproject.org/wiki/Fedora_36_Mass_Rebuild

OpenSSL 3.0 compatibility

Rebuilt with OpenSSL 3.0.0

Use -l (--listen) flag when starting myproxy-server in test scripts
breaks tests in koji, even though local mock build works)
Typo fixes

Exit with error if voms-proxy-init fails (6.2.7)
Update default run directory from /var/run to /run (6.2.8)

Rebuilt for https://fedoraproject.org/wiki/Fedora_35_Mass_Rebuild