libcloud -- possible SSL MITM due to invalid regexp used to validate target server hostname

The libcloud development team reports:

When establishing a secure (SSL / TLS) connection to a target server an invalid regular
expression has been used for performing the hostname verification. Subset instead of the
full target server hostname has been marked an an acceptable match for the given hostname.
For example, certificate with a hostname field of “aexample.com” was considered a valid
certificate for domain “example.com”.