Update schismtracker to 20160521 and take maintainership.

- Project moved to GitHub so fetch distfile from there
- Changed comment to a more accurate description
- Release tarball doesn't bundle a configure script, so the port now
  uses autoconf + automake, with patched configure.ac (comment in file)
- Use upstream Makefile install target, as it also installs manpage

OK jung@

audio/schismtracker/Makefile

@@ -1,30 +1,39 @@
-# $OpenBSD: Makefile,v 1.4 2015/08/25 13:18:24 sthen Exp $
+# $OpenBSD: Makefile,v 1.5 2016/09/01 12:47:22 fcambus Exp $
+
+COMMENT =	open-source reimplementation of Impulse Tracker
+
+GH_ACCOUNT =	schismtracker
+GH_PROJECT =	schismtracker
+GH_TAGNAME =	20160521
 
-COMMENT =	free module tracker editor and player
-DISTNAME =	schismtracker-20150425
-EXTRACT_SUFX =	.tar.bz2
 CATEGORIES =	audio x11
-REVISION =	0
 
 HOMEPAGE =	http://schismtracker.org/
 
+MAINTAINER =	Frederic Cambus <fred@statdns.com>
+
 # GPLv2+
 PERMIT_PACKAGE_CDROM =	Yes
 
-WANTLIB += SDL X11 Xext Xv c m pthread
-
-MASTER_SITES =	http://mirrors.nycbug.org/pub/distfiles/
+WANTLIB +=	SDL X11 Xext Xv c m pthread
 
 MODULES =	lang/python
 
 MODPY_RUNDEP =	No
 
+BUILD_DEPENDS =	${MODGNU_AUTOCONF_DEPENDS} \
+		${MODGNU_AUTOMAKE_DEPENDS}
+
 LIB_DEPENDS =	devel/sdl
 
 CONFIGURE_STYLE =	gnu
-CONFIGURE_ARGS =	--disable-mercurial
+AUTOCONF_VERSION =	2.69
+AUTOMAKE_VERSION =	1.15
 
-do-install:
-	${INSTALL_PROGRAM} ${WRKSRC}/schismtracker ${PREFIX}/bin
+pre-configure:
+	@cd ${WRKSRC} && \
+	AUTOCONF_VERSION=${AUTOCONF_VERSION} \
+	AUTOMAKE_VERSION=${AUTOMAKE_VERSION} \
+	autoreconf -i
 
 .include <bsd.port.mk>

audio/schismtracker/distinfo

@@ -1,2 +1,2 @@
-SHA256 (schismtracker-20150425.tar.bz2) = vBBkpG67SATMuPHsVTvXAwkG6ou1zpb4Ne4GW7QOXSU=
-SIZE (schismtracker-20150425.tar.bz2) = 1276317
+SHA256 (schismtracker-20160521.tar.gz) = n0kCjb98kP0KnwxmS0fkecgebU90aoYkqY3mUTkR2TA=
+SIZE (schismtracker-20160521.tar.gz) = 1026780

audio/schismtracker/patches/patch-Makefile_am

@@ -0,0 +1,15 @@
+$OpenBSD: patch-Makefile_am,v 1.1 2016/09/01 12:47:22 fcambus Exp $
+
+OpenBSD doesn't need libdl
+
+--- Makefile.am.orig	Sat May 21 16:40:41 2016
++++ Makefile.am	Sat Aug 13 21:17:33 2016
+@@ -358,8 +358,3 @@ AM_OBJCFLAGS = $(AM_CFLAGS)
+ 
+ schismtracker_DEPENDENCIES = $(files_windres)
+ schismtracker_LDADD = $(lib_asound) $(lib_win32) $(SDL_LIBS) $(LIBM)
+-
+-if ! USE_WIN32
+-schismtracker_LDADD += -ldl
+-endif
+-

audio/schismtracker/patches/patch-configure_ac

@@ -0,0 +1,27 @@
+$OpenBSD: patch-configure_ac,v 1.1 2016/09/01 12:47:22 fcambus Exp $
+
+- Prevent calling Git to obtain date of the last commit, and hardcode
+  [last_git_commit] value to match package version
+- Fix log2() function detection
+
+--- configure.ac.orig	Sat May 21 16:40:41 2016
++++ configure.ac	Fri Aug 19 22:54:30 2016
+@@ -21,9 +21,7 @@ dnl You should have received a copy of the GNU General
+ dnl along with this program; if not, write to the Free Software
+ dnl Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ 
+-dnl PACKAGE_VERSION will be either " " if not using git, or date of the last git commit in the form YYYYMMDD
+-m4_define([last_git_commit], patsubst(m4_esyscmd([git log -n 1 --date=short --format=format:%cd]), [[^0-9]]))
+-AC_INIT([schismtracker], [last_git_commit])
++AC_INIT([schismtracker], [20160521])
+ 
+ AC_CONFIG_SRCDIR([schism/main.c])
+ 
+@@ -58,6 +56,7 @@ dnl Check for SDL libs
+ AM_PATH_SDL(1.2.10, , AC_MSG_ERROR([*** SDL version >= 1.2.10 not found.]))
+ 
+ dnl Functions
++AC_CHECK_LIB([m], [log2])
+ AC_CHECK_FUNCS(strchr memmove strerror strtol strcasecmp strncasecmp strverscmp stricmp strnicmp strcasestr strptime asprintf vasprintf memcmp mmap nice unsetenv dup fnmatch log2 mkstemp)
+ AM_CONDITIONAL([NEED_ASPRINTF], [test "$ac_cv_func_asprintf" = "no"])
+ AM_CONDITIONAL([NEED_VASPRINTF], [test "$ac_cv_func_vasprintf" = "no"])

audio/schismtracker/pkg/PLIST

@@ -1,2 +1,3 @@
-@comment $OpenBSD: PLIST,v 1.1.1.1 2013/11/13 01:09:51 bcallah Exp $
+@comment $OpenBSD: PLIST,v 1.2 2016/09/01 12:47:22 fcambus Exp $
 @bin bin/schismtracker
+@man man/man1/schismtracker.1