HBSD: fix the MASTER_SITES for x11-wm/piewm
- HBSD: fix the MASTER_SITES for x11-wm/piewm
http://www.catwhisker.org/~david/FreeBSD/distfiles/piewm-1.04.tar.gz is corrupted.
See bad SHA-256: https://www.virustotal.com/gui/url/3c64fd5ee2c52adfedbf16e9ead73f8ad8c2eaab4b12e6075bdf95e0c9b793b9/details
Let's use the OpenBSD distfiles.
Signed-off-by: Loic loic.f@hardenedbsd.org