misc/170503: freebsd-update mirror finding is case sensitive

>Number:         170503
>Category:       misc
>Synopsis:       freebsd-update mirror finding is case sensitive
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Thu Aug 09 14:50:01 UTC 2012
>Closed-Date:
>Last-Modified:
>Originator:     Wybe van der Ham
>Release:        8.3
>Organization:
none
>Environment:
FreeBSD testmachine 8.3-RELEASE FreeBSD 8.3-RELEASE #0: Mon Apr  9 21:47:23 UTC 2012    
root <at> almeida.cse.buffalo.edu:/usr/obj/usr/src/sys/GENERIC  i386
>Description:
The freebsd-update script tries to find mirrors using SRV records. My Mikrotik router with built-in
nameserver gives the following output:
# host -t srv _http._tcp.update.FreeBSD.org
_http._tcp.update.freebsd.org has SRV record 1 35 80 update4.FreeBSD.org.
_http._tcp.update.freebsd.org has SRV record 1 50 80 update5.FreeBSD.org.