pkg/51154: pkg_alternatives-provided python is incompatible with shebangs

[yamamoto%ovn.org@localhost]

>Number:         51154
>Category:       pkg
>Synopsis:       pkg_alternatives-provided python is incompatible with shebangs
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    pkg-manager
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Fri May 20 07:20:00 +0000 2016
>Originator:     YAMAMOTO Takashi
>Release:        
>Organization:
>Environment:
NetBSD n7.localdomain 7.0 NetBSD 7.0 (GENERIC.201509250726Z) amd64

packages installed from ftp://ftp.netbsd.org/pub/pkgsrc/packages/NetBSD/$arch/7.0.0/All
>Description:
"python" command provided by pkg_alternatives is a shell script,
and thus can not be used in shebang lines directly.

cf. https://github.com/openvswitch/ovs/commit/af51e6f0156eb82e2e2a7f0ba369c0e4cbfb6853

>How-To-Repeat:

>Fix:
rewrite the proxy command in C?