Merge pull request #1065 from 4fury/master

new homepages.

system/base/readline/pspec.xml

@@ -3,7 +3,7 @@
 <PISI>
     <Source>
         <Name>readline</Name>
-        <Homepage>http://cnswww.cns.cwru.edu/php/chet/readline/rltop.html</Homepage>
+        <Homepage>https://tiswww.case.edu/php/chet/readline/rltop.html</Homepage>
         <Packager>
             <Name>PisiLinux Community</Name>
             <Email>admins@pisilinux.org</Email>

system/base/shadow/pspec.xml

@@ -3,7 +3,7 @@
 <PISI>
     <Source>
         <Name>shadow</Name>
-        <Homepage>http://pkg-shadow.alioth.debian.org/</Homepage>
+        <Homepage>https://github.com/shadow-maint/shadow</Homepage>
         <Packager>
             <Name>PisiLinux Community</Name>
             <Email>admins@pisilinux.org</Email>

system/base/which/pspec.xml

@@ -3,7 +3,7 @@
 <PISI>
     <Source>
         <Name>which</Name>
-        <Homepage>http://www.xs4all.nl/~carlo17/which/</Homepage>
+        <Homepage>https://carlowood.github.io/which/</Homepage>
         <Packager>
             <Name>PisiLinux Community</Name>
             <Email>admins@pisilinux.org</Email>

system/base/zlib/pspec.xml

@@ -3,7 +3,7 @@
 <PISI>
     <Source>
         <Name>zlib</Name>
-        <Homepage>http://www.gzip.org/zlib/</Homepage>
+        <Homepage>https://www.zlib.net/</Homepage>
         <Packager>
             <Name>PisiLinux Community</Name>
             <Email>admins@pisilinux.org</Email>