doc: fix hyperlink refs in man page docs

PR-URL: #283
Credit: @isaacs
Close: #283
Reviewed-by: @ruyadorno

Author: isaacs

scripts/docs-build.js

@@ -10,22 +10,17 @@ var dest = args[1] || src
 fs.readFile(src, 'utf8', function (err, data) {
   if (err) return console.log(err)
 
-  var fileExt = src.split('.').pop()
   var result = data.replace(/@VERSION@/g, npm.version)
+    .replace(/---([\s\S]+)---/g, '')
+    .replace(/(npm-)?([a-zA-Z\\.-]*)\(1\)/g, 'npm help $2')
+    .replace(/(npm-)?([a-zA-Z\\.-]*)\((5|7)\)/g, 'npm help $2')
+    .replace(/npm(1)/g, 'npm help npm')
+    .replace(/\[([^\]]+)\]\(\/cli-commands\/([^)]+)\)/g, 'npm help $2')
+    .replace(/\[([^\]]+)\]\(\/configuring-npm\/([^)]+)\)/g, 'npm help $2')
+    .replace(/\[([^\]]+)\]\(\/using-npm\/([^)]+)\)/g, 'npm help $2')
+    .trim()
 
-  if (fileExt === 'md') {
-    result = marked(
-      result.replace(/---([\s\S]+)---/g, '')
-        .replace(/(npm-)?([a-zA-Z\\.-]*)\(1\)/g, 'npm help $2')
-        .replace(/(npm-)?([a-zA-Z\\.-]*)\((5|7)\)/g, 'npm help $2')
-        .replace(/(npm-)?([a-zA-Z\\.-]*)\(3\)/g, 'npm apihelp $2')
-        .replace(/npm(1)/g, 'npm help npm')
-        .replace(/npm(3)/g, 'npm apihelp npm')
-        .trim()
-    )
-  }
-
-  fs.writeFile(dest, result, 'utf8', function (err) {
+  fs.writeFile(dest, marked(result), 'utf8', function (err) {
     if (err) return console.log(err)
   })
 })