sysutils/wmapm: fix with -fno-common, update HOMEPAGE and MASTER_SITES

Hi,

The fix is taken from Gentoo [0]. While here i've updated HOMEPAGE and
MASTER_SITES, refreshed WANTLIB and an existing patch.

It works fine on amd64.

OK?

Charlène.


[0]
https://gitweb.gentoo.org/repo/gentoo.git/tree/x11-plugins/wmapm/files/wmapm-3.1-fno-common.patch


Index: Makefile
===================================================================
RCS file: /cvs/ports/sysutils/wmapm/Makefile,v
retrieving revision 1.30
diff -u -p -u -p -r1.30 Makefile
--- Makefile 12 Jul 2019 20:49:54 -0000 1.30
+++ Makefile 30 Jan 2021 15:14:37 -0000
@@ -5,16 +5,16 @@ ONLY_FOR_ARCHS= ${APM_ARCHS}
COMMENT= wm-dockapp; APM/battery monitor

DISTNAME= wmapm-3.1
-REVISION = 3
+REVISION = 4
CATEGORIES= sysutils x11 x11/windowmaker

-HOMEPAGE= http://nis-www.lanl.gov/~mgh/WindowMaker/DockApps.shtml
+HOMEPAGE= https://www.dockapps.net/wmapm

# GPL
PERMIT_PACKAGE= Yes
-WANTLIB= X11 Xext Xpm c xcb
+WANTLIB= X11 Xext Xpm c

-MASTER_SITES= http://nis-www.lanl.gov/~mgh/WindowMaker/
+MASTER_SITES= https://www.dockapps.net/download/

NO_TEST= Yes

Index: patches/patch-wmapm_c
===================================================================
RCS file: /cvs/ports/sysutils/wmapm/patches/patch-wmapm_c,v
retrieving revision 1.2
diff -u -p -u -p -r1.2 patch-wmapm_c
--- patches/patch-wmapm_c 7 Mar 2005 05:37:20 -0000 1.2
+++ patches/patch-wmapm_c 30 Jan 2021 15:14:37 -0000
@@ -1,6 +1,7 @@
$OpenBSD: patch-wmapm_c,v 1.2 2005/03/07 05:37:20 mcbride Exp $
---- wmapm/wmapm.c.orig Tue Jan 11 17:37:25 2000
-+++ wmapm/wmapm.c Wed Jan 10 17:35:20 2001
+Index: wmapm/wmapm.c
+--- wmapm/wmapm.c.orig
++++ wmapm/wmapm.c
@@ -151,12 +151,17 @@