This update for c-ares fixes the following issue:

- Allow '_' as part of DNS response. (bsc#1190225)
- 'c-ares' 1.17.2 introduced response validation to prevent a security issue, however it was not listing '_' as a
valid character for domain name responses which caused issues when a 'CNAME' referenced a 'SRV' record which
contained underscores.

This update was imported from the SUSE:SLE-15:Update update project.