pkg/49906: MASTER_SITE urls with prefixed "-" fail to fetch

[bad%bsd.de@localhost]

>Number:         49906
>Category:       pkg
>Synopsis:       "MASTER_SITE= -https://example.com/zorch"; fails to fetch
>Confidential:   no
>Severity:       serious
>Priority:       high
>Responsible:    pkg-manager
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Thu May 14 17:35:00 +0000 2015
>Originator:     Christoph Badura
>Release:        NetBSD 6.1_STABLE
>Organization:
bozotic software testing labs
	
>Environment:
	
	
System: NetBSD size-isnt-everything 6.1_STABLE NetBSD 6.1_STABLE (thinkpad-500) #6: Wed Feb 11 19:35:21 MET 2015 bad@size-isnt-everything:/u/0/trees/src/netbsd-6/sys/arch/amd64/compile/thinkpad-500 amd64
Architecture: x86_64
Machine: amd64
>Description:
	
E.g.:

cd /usr/pkgsrc/security/mozilla-rootcerts && /usr/bin/make fetch-list | sh
ftp: unknown option -- h
usage: ftp [-46AadefginpRtVv] [-N netrc] [-o outfile] [-P port] [-q quittime]
           [-r retry] [-s srcaddr] [-T dir,max[,inc]]
           [[user@]host [port]] [host:path[/]] [file:///file]
           [ftp://[user[:pass]@]host[:port]/path[/]]
           [http://[user[:pass]@]host[:port]/path] [...]
           [https://[user[:pass]@]host[:port]/path] [...]
       ftp -u URL file [...]
certdata-20141117.txt not fetched

cd /usr/pkgsrc/mail/postfix && /usr/bin/make fetch-list | sh
ftp: unknown option -- h
usage: ftp [-46AadefginpRtVv] [-N netrc] [-o outfile] [-P port] [-q quittime]
           [-r retry] [-s srcaddr] [-T dir,max[,inc]]
           [[user@]host [port]] [host:path[/]] [file:///file]
           [ftp://[user[:pass]@]host[:port]/path[/]]
           [http://[user[:pass]@]host[:port]/path] [...]
           [https://[user[:pass]@]host[:port]/path] [...]
       ftp -u URL file [...]
cyrus-sasl-dedad73e5e7a75d01a5f3d5a6702ab8ccd2ff40d.patch.v2 not fetched


>How-To-Repeat:
	
E.g.:

cd /usr/pkgsrc/security/mozilla-rootcerts && /usr/bin/make fetch-list | sh
cd /usr/pkgsrc/mail/postfix && /usr/bin/make fetch-list | sh

>Fix:
now idea.
	

>Unformatted: