ERROR: module 'ssl' has no attribute 'match_hostname'

Description

Onionprobe on Debian sid is displaying the following error (example):

ERROR: module 'ssl' has no attribute 'match_hostname'

Tasks

• Detect whether ssl.match_hostname() is available.
• Use an alternative to ssl.match_hostname() if it's not available.

Time estimation

• Complexity: very small (0.5 day)
• Uncertainty: low (x1.1)
• Reference (adapted)