dosbox: re-classify version scheme

This new version is easier to be manipulated.

srcpkgs/dosbox/template

@@ -1,8 +1,8 @@
 # Template file for 'dosbox'
 pkgname=dosbox
-version=0.74.3
-revision=1
-wrksrc=${pkgname}-0.74-3
+version=0.74pl3
+revision=2
+wrksrc="${pkgname}-${version/pl/-}"
 build_style=gnu-configure
 hostmakedepends="pkg-config"
 makedepends="alsa-lib-devel libpng-devel SDL_net-devel SDL_sound-devel"
@@ -10,7 +10,7 @@ short_desc="DOS x86 emulator with Tandy/Herc/CGA/EGA/VGA/SVGA graphics and sound
 maintainer="Orphaned <orphan@voidlinux.org>"
 license="GPL-2.0-or-later"
 homepage="http://www.dosbox.com"
-distfiles="${SOURCEFORGE_SITE}/${pkgname}/${wrksrc}.tar.gz"
+distfiles="${SOURCEFORGE_SITE}/${pkgname}/dosbox-${version/pl/-}.tar.gz"
 checksum=c0d13dd7ed2ed363b68de615475781e891cd582e8162b5c3669137502222260a
 
 post_install() {

srcpkgs/dosbox/update

@@ -0,0 +1 @@
+pattern="dosbox-\K[0-9.-]*(?=.tar.gz)"