[Bug libc/15374] New: Make getent services compliant with RFC 6335 section 5.1

["cambridge at users dot sf.net" <sourceware-bugzilla at sourceware dot org>]

http://sourceware.org/bugzilla/show_bug.cgi?id=15374

             Bug #: 15374
           Summary: Make getent services compliant with RFC 6335 section
                    5.1
           Product: glibc
           Version: 2.18
            Status: NEW
          Severity: normal
          Priority: P2
         Component: libc
        AssignedTo: unassigned@sourceware.org
        ReportedBy: cambridge@users.sf.net
                CC: drepper.fsp@gmail.com
    Classification: Unclassified


RFC 6335 section 5.1 permits service names with leading digits.

nss/getent.c does not, as they would be treated as port numbers:

 791       if (isdigit (key[i][0]))
 792         serv = getservbyport (htons (atol (key[i])), proto);
 793       else
 794         serv = getservbyname (key[i], proto);

Checking IANA, there are currently 28 service names registered that begin with
a digit, for example 3com-tsmux and 3gpp-cbsp.

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