apache-httpd broken with apr-1.7.5 under 7.7

Hi misc@,

apache-httpd is broken under 7.7-stable in conjunction with apr-1.7.5.

The following messages are logged in the Apache error log when trying
to access a ProxyPass target:

[proxy:error] [pid 93733] (22)Invalid argument: AH00957: http: attempt
to connect to $IP:8080 ($FQDN:8080) failed
[proxy_http:error] [pid 93733] [client $IP:42558] AH01114: HTTP: failed
to make connection to backend: $FQDN

Accessing the same resource via curl works just fine.

Could be related to https://bz.apache.org/bugzilla/show_bug.cgi?id=69410
for which FreeBSD implemented a patch.

Downgrading to apr-1.7.2 fixes the issue.
The issue does not exist when using apr-1.7.5 under 7.6-stable.

- Alexander