libkml: conflicts with minizip

libkml builds and installs a copy of minizip that conflicts with the
MacPorts copy.

Also modernise checksums and add GitHub handle to maintainers.

archivers/zlib/Portfile

@@ -6,7 +6,7 @@ PortGroup               xcodeversion 1.0
 name                    zlib
 version                 1.2.11
 categories              archivers
-maintainers             ryandesign openmaintainer
+maintainers             {ryandesign @ryandesign} openmaintainer
 license                 zlib
 homepage                http://www.zlib.net/
 platforms               darwin freebsd
@@ -22,7 +22,8 @@ master_sites            ${homepage}
 use_xz                  yes
 
 checksums               rmd160  3f3ecd35efa6d41ba7b90e5f6e872e2ee8e42044 \
-                        sha256  4ff941449631ace0d4d203e3483be9dbc9da454084111f97ea0a2114e19bf066
+                        sha256  4ff941449631ace0d4d203e3483be9dbc9da454084111f97ea0a2114e19bf066 \
+                        size    467960
 
 minimum_xcodeversions   {8 2.4.1 9 3.1}
 
@@ -35,6 +36,8 @@ test.run                yes
 destroot.destdir        prefix=${destroot}${prefix}
 
 if {${name} eq ${subport}} {
+    revision            0
+
 post-destroot {
     platform darwin {
         foreach {neededfile} "${prefix}/lib/libz.dylib" {
@@ -60,6 +63,8 @@ livecheck.url           ${homepage}
 livecheck.regex         ${name}-(\[0-9.\]+)\\.tar
 
 subport minizip {
+    revision            0
+    conflicts           libkml
 
     description Minizip zip file manipulation library
     long_description ${description}

gis/libkml/Portfile

@@ -1,14 +1,15 @@
 # -*- 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               conflicts_build 1.0
 
 name                    libkml
 version                 1.2.0
 revision                4
 license                 BSD
 platforms               darwin
 categories              gis
-maintainers             ryandesign openmaintainer
+maintainers             {ryandesign @ryandesign} openmaintainer
 
 description             library to parse, generate and operate on KML
 
@@ -24,9 +25,9 @@ master_sites            googlecode
 # https://github.com/CPB9/libkml
 # https://github.com/libkml/libkml
 
-checksums               md5     25d534437f971bf55a945608e39fea79 \
-                        sha1    3fa5acdc2b2185d7f0316d205002b7162f079894 \
-                        rmd160  f73ed3ce47d38c5d45bd04c9498a847b24c572da
+checksums               rmd160  f73ed3ce47d38c5d45bd04c9498a847b24c572da \
+                        sha256  fae9085e4cd9f0d4ae0d0626be7acf4ad5cbb37991b9d886df29daf72df37cbc \
+                        size    9041987
 
 # If curl is found, the networking examples will be built. There is no
 # configure flag to turn this off, but the examples are not installed.
@@ -52,6 +53,9 @@ post-patch {
     }
 }
 
+conflicts               minizip
+conflicts_build         minizip
+
 use_autoreconf          yes
 
 configure.args-append   --disable-dependency-tracking \
@@ -66,7 +70,7 @@ test.target             check
 post-destroot {
     set docdir ${prefix}/share/doc/${subport}
     xinstall -d ${destroot}${docdir}
-    xinstall -W ${worksrcpath} -m 644 \
+    xinstall -W ${worksrcpath} -m 0644 \
         AUTHORS \
         COPYING \
         ChangeLog \