pkg/49157: pkgsrc won't boot strap in case you have umlaut in the user name

[nahumoz%gmail.com@localhost]

>Number:         49157
>Category:       pkg
>Synopsis:       pkgsrc won't boot strap in case you have umlaut in the user 
>name
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    pkg-manager
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Wed Aug 27 07:50:00 +0000 2014
>Originator:     Oz Nahum Tiram
>Release:        pkgsrc-2014Q2
>Organization:
Private 
>Environment:
Darwinl 13.3.0 Darwin Kernel Version 13.3.0: Tue Jun  3 21:27:35 PDT 2014; 
root:xnu-2422.110.17~1/RELEASE_X86_64 x86_64
>Description:
I invoked pkgsrc bootstrap the following way:

./bootstrap --ignore-user-check

===> bootstrap started: Wed Aug 27 09:40:46 CEST 2014
Working directory is: /Users/tiramo/Downloads/pkgsrc-2014Q2/bootstrap/work
===> running: /usr/bin/sed -e 's|@DEFAULT_INSTALL_MODE@|'0755'|' 
/Users/tiramo/Downloads/pkgsrc-2014Q2/sysutils/install-sh/files/install-sh.in > 
/Users/tiramo/Downloads/pkgsrc-2014Q2/bootstrap/work/bin/install-sh
===> running: /bin/chmod +x 
/Users/tiramo/Downloads/pkgsrc-2014Q2/bootstrap/work/bin/install-sh
===> building as unprivileged user tiramo/SERVICEPLAN\Domänen-Benutzer
===> Creating default mk.conf in 
/Users/tiramo/Downloads/pkgsrc-2014Q2/bootstrap/work
===> running: /bin/sh 
/Users/tiramo/Downloads/pkgsrc-2014Q2/bootstrap/work/bin/install-sh -d -o 
tiramo -g COMPANY\Domänen-Benutzer 
/Users/tiramo/Downloads/pkgsrc-2014Q2/bootstrap/work/sbin
chgrp: SERVICEPLANDomänen-Benutzer: illegal group name
===> exited with status 1
aborted.
>How-To-Repeat:

>Fix: