Use COPYING file for license

PKGBUILD

@@ -30,6 +30,7 @@ build() {
 package() {
   cd $pkgname-$pkgver
   make DESTDIR="$pkgdir" install
+  install -Dm644 COPYING "$pkgdir/usr/share/licenses/$pkgname/LICENSE"
 
   # fool packages looking to link to non-wide-character ncurses libraries
   for lib in ncurses ncurses++ form panel menu; do
@@ -45,8 +46,4 @@ package() {
   # some packages look for -lcurses during build
   echo 'INPUT(-lncursesw)' > "$pkgdir/usr/lib/libcursesw.so"
   ln -s libncurses.so "$pkgdir/usr/lib/libcurses.so"
-
-  # install license, rip it from the readme
-  install -d "$pkgdir/usr/share/licenses/$pkgname"
-  grep -B 100 '$Id' README > "$pkgdir/usr/share/licenses/$pkgname/LICENSE"
 }