[Bug network/19582] New: Deprecate RES_USE_INET6

["fweimer at redhat dot com" <sourceware-bugzilla at sourceware dot org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=19582

            Bug ID: 19582
           Summary: Deprecate RES_USE_INET6
           Product: glibc
           Version: 2.24
            Status: NEW
          Severity: normal
          Priority: P2
         Component: network
          Assignee: unassigned at sourceware dot org
          Reporter: fweimer at redhat dot com
  Target Milestone: ---
             Flags: security-

The RES_USE_INET6 option flag and the inet6 option do not work as documented. 
The original intent (as seen on other systems) is to cause gethostbyname to
return AF_INET6 addresses instead of AF_INET address.  But due to the way the
interface works, most applications using gethostbyname will not understand such
addresses.

The internal uses of the RES_USE_INET6 flag also appear to be inconsistent and
seem incompatible with nscd.

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