doc: fix blog link in blog posts and README

Apparently Joyent decommissioned joyeur.com but at least they saved the
contents of the blog.  Update the links in the README and the nodejs.org
blog posts.

Hat tip to Eugen Pirogoff (@eugenpirogoff) for pointing it out.

Fixes #6224.

README.md

@@ -50,7 +50,7 @@ Resources for Newcomers
 ---
   - [The Wiki](https://github.com/joyent/node/wiki)
   - [nodejs.org](http://nodejs.org/)
-  - [how to install node.js and npm (node package manager)](http://joyeur.com/2010/12/10/installing-node-and-npm/)
+  - [how to install node.js and npm (node package manager)](http://www.joyent.com/blog/installing-node-and-npm/)
   - [list of modules](https://github.com/joyent/node/wiki/modules)
   - [searching the npm registry](http://npmjs.org/)
   - [list of companies and projects using node](https://github.com/joyent/node/wiki/Projects,-Applications,-and-Companies-Using-Node)

doc/blog/Uncategorized/an-easy-way-to-build-scalable-network-programs.md

@@ -13,4 +13,4 @@ It has also been suggested that Node does not take advantage of multicore machin
 
 Node has a clear purpose: provide an easy way to build scalable network programs. It is not a tool for every problem. Do not write a ray tracer with Node. Do not write a web browser with Node. Do however reach for Node if tasked with writing a DNS server, DHCP server, or even a video encoding server.
 
-By relying on the kernel to schedule and preempt computationally expensive tasks and to load balance incoming connections, Node appears less magical than server platforms that employ userland scheduling. So far, our focus on simplicity and transparency has paid off: <a href="http://joyeur.com/2011/08/11/node-js-meetup-distributed-web-architectures/">the</a> <a href="http://venturebeat.com/2011/08/16/linkedin-node/">number</a> <a href="http://corp.klout.com/blog/2011/10/the-tech-behind-klout-com/">of</a> <a href="http://www.joelonsoftware.com/items/2011/09/13.html">success</a> <a href="http://pow.cx/">stories</a> from developers and corporations who are adopting the technology continues to grow.
+By relying on the kernel to schedule and preempt computationally expensive tasks and to load balance incoming connections, Node appears less magical than server platforms that employ userland scheduling. So far, our focus on simplicity and transparency has paid off: <a href="http://www.joyent.com/blog/node-js-meetup-distributed-web-architectures/">the</a> <a href="http://venturebeat.com/2011/08/16/linkedin-node/">number</a> <a href="http://corp.klout.com/blog/2011/10/the-tech-behind-klout-com/">of</a> <a href="http://www.joelonsoftware.com/items/2011/09/13.html">success</a> <a href="http://pow.cx/">stories</a> from developers and corporations who are adopting the technology continues to grow.

doc/blog/Uncategorized/the-videos-from-node-meetup.md

@@ -7,4 +7,4 @@ slug: the-videos-from-node-meetup
 
 Uber, Voxer, and Joyent described how they use Node in production
 
-<a href="http://joyeur.com/2011/08/11/node-js-meetup-distributed-web-architectures/">http://joyeur.com/2011/08/11/node-js-meetup-distributed-web-architectures/</a>
+<a href="http://www.joyent.com/blog/node-js-meetup-distributed-web-architectures/">http://www.joyent.com/blog/node-js-meetup-distributed-web-architectures/</a>