rfcdiff: Update to 1.48

Closes: https://trac.macports.org/ticket/71546

textproc/rfcdiff/Portfile

@@ -1,29 +1,30 @@
 # -*- coding: utf-8; mode: tcl; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- vim:fenc=utf-8:ft=tcl:et:sw=4:ts=4:sts=4
 
 PortSystem 1.0
+PortGroup           github 1.0
+
+github.setup        ietf-tools rfcdiff 1.48
+revision            0
+checksums           rmd160  e1cbd1e883049bf6f27946d66c3d1ca2e6bb1287 \
+                    sha256  11d08d059716275c3f2d25e03d1711be83bcf14de57a62fadf3406eaa0a75ade \
+                    size    10352
 
-name             rfcdiff
-version          1.34
-revision         1
 categories       textproc
 maintainers      nomaintainer
+license             GPL-2+
+platforms           any
+supported_archs     noarch
+
 description      compare Internet Draft versions
 long_description \
 	The purpose of this program is to compare two versions of \
 	an Internet Draft and produce a diff.
-homepage         http://tools.ietf.org/tools/rfcdiff/
-platforms        darwin
-master_sites     ${homepage}
-distname         ${name}-v${version}
-extract.suffix
-checksums        md5     974529296eda40a8c46a1ef6c5db7e57 \
-                 sha1    5a2bf0c2b1bb4a4a02482166a45df88e7e5bf87f \
-                 rmd160  fe97b99abc4bd22cef1b3214ba124a6da7d69fd5
 
-extract.only
+github.tarball_from archive
+
 use_configure    no
 build            {}
 
 destroot {
-	xinstall -m 755 ${distpath}/${distname} ${destroot}${prefix}/bin/${name}
+    xinstall ${worksrcpath}/${name} ${destroot}${prefix}/bin/
 }