py-pylibmc: update to 1.6.0, add py37

- add explicit dependency on zlib
- refresh patch
- update hompage
- use default PyPI livecheck
- install files in post-destroot

python/py-pylibmc/Portfile

@@ -4,7 +4,8 @@ PortSystem          1.0
 PortGroup           python 1.0
 
 name                py-pylibmc
-version             1.5.1
+version             1.6.0
+revision            0
 license             BSD
 platforms           darwin
 
@@ -15,26 +16,33 @@ long_description    pylibmc is a Python wrapper around the accompanying \
                     C Python extension _pylibmc, which is a wrapper around \
                     libmemcached from TangentOrg
 
-homepage            https://pypi.python.org/pypi/pylibmc
+homepage            http://sendapatch.se/projects/pylibmc/
 master_sites        pypi:p/pylibmc/
 distname            pylibmc-${version}
 
-checksums           rmd160  24ff2977e97eef5446dbc491ada668baa02c5ff3 \
-                    sha256  ecba261859c3e1ba3365389cb4f4dfffb7e02120a9f57a288cacf2f42c45cdd6
+checksums           rmd160  d427f286e6a8ea7c9daacce0f2b16b01f5314293 \
+                    sha256  5ef97be4ca5527d5b87dbe77cfdd94b427028caf4136feff7da23c40e1ded6d8 \
+                    size    65925
 
-python.versions     27 34 35 36
+python.versions     27 34 35 36 37
 
 if {${name} ne ${subport}} {
-    depends_lib-append  port:libmemcached
+    depends_lib-append  port:libmemcached \
+                        port:zlib
 
     if {${os.platform} eq "darwin" && ${os.major} <= 10} {
         patchfiles-append patch-pylibmcmodule.c.diff
     }
 
     build.target        build_ext
-    build.args          --with-libmemcached=${prefix}
+    build.args-append   --with-libmemcached=${prefix}
+
+    post-destroot {
+        set docdir ${prefix}/share/doc/${subport}
+        xinstall -d ${destroot}${docdir}
+        xinstall -m 0644 -W ${worksrcpath} README.rst LICENSE \
+            ${destroot}${docdir}
+    }
 
     livecheck.type      none
-} else {
-    livecheck.type      pypi
 }

python/py-pylibmc/files/patch-pylibmcmodule.c.diff

@@ -1,5 +1,5 @@
---- _pylibmcmodule.c.orig	2012-03-07 11:00:09.000000000 -0500
-+++ _pylibmcmodule.c	2012-03-07 11:03:21.000000000 -0500
+--- src/_pylibmcmodule.c.orig	2018-11-09 12:42:08.000000000 -0500
++++ src/_pylibmcmodule.c	2019-04-04 20:47:03.000000000 -0400
 @@ -46,6 +46,25 @@
      { Py_INCREF(obj); \
        PyModule_AddObject(mod, nam, obj); }
@@ -24,5 +24,5 @@
 +  return r;
 +}
 
- /* {{{ Type methods */
- static PylibMC_Client *PylibMC_ClientType_new(PyTypeObject *type,
+ /* Some Python 3 porting stuff */
+ #ifndef Py_TYPE