Added iMSCP::OpenSSL::getCertificateExpiryTime() method - Allow to get SSL certificate expiry time (UNIX timestamp)

Quote from i-MSCP Github (1.2.x)

Code

1. Added iMSCP::OpenSSL::getCertificateExpiryTime() method - Allow to get SSL certificate expiry time (UNIX timestamp)
2. Typo +++
3. [ci skip]

Source: https://github.com/i-MSCP/imsc…97d8673497b1d99fdcce6e280