Fix new []/delete mismatch in ~Base64Converter.
Fix buffer overlows in IP address masking logic.

That could occur either in taking a zero-length mask on an IPv6 address
(e.g. [fe80::]/0) or a reverse mask of length 128 on any address (e.g.
via the remask_addr BuiltIn Function).
Fix buffer over-reads in file_analysis::Manager::Terminate()
Fix new []/delete mismatch in input::reader::Raw::DoClose().
Fix memory leaks in X509 certificate parsing/verification.
Change handling of atypical OpenSSL error case in x509 verification.
Merge branch 'topic/jsiwek/asan-fixes'