Massive conversion from Package to AutotoolsPackage (#2845)

* Massive conversion from Package to AutotoolsPackage

* Forgot to convert p4est to AutotoolsPackage

* Fix typo

* Fix broken link in docs

var/spack/repos/builtin/packages/rsync/package.py

@@ -25,16 +25,10 @@
 from spack import *
 
 
-class Rsync(Package):
+class Rsync(AutotoolsPackage):
     """An open source utility that provides fast incremental file transfer."""
     homepage = "https://rsync.samba.org"
     url      = "https://download.samba.org/pub/rsync/rsync-3.1.1.tar.gz"
 
     version('3.1.2', '0f758d7e000c0f7f7d3792610fad70cb')
     version('3.1.1', '43bd6676f0b404326eee2d63be3cdcfe')
-
-    def install(self, spec, prefix):
-        configure('--prefix=%s' % prefix)
-
-        make()
-        make("install")