Fix broken links in the documentation #194

Author: steve-s

README.md

@@ -2,21 +2,21 @@ A high-performance implementation of the R programming language, built on GraalV
 
 FastR aims to be:
 * [efficient](https://medium.com/graalvm/faster-r-with-fastr-4b8db0e0dceb#4ab6): executing R language scripts faster than any other R runtime and as fast as `Rcpp`
-* [polyglot](https://medium.com/graalvm/faster-r-with-fastr-4b8db0e0dceb#0f5c): allowing fast [polyglot interoperability](https://www.graalvm.org/docs/reference-manual/polyglot/) with other languages in the GraalVM ecosystem.
+* [polyglot](https://medium.com/graalvm/faster-r-with-fastr-4b8db0e0dceb#0f5c): allowing fast [polyglot interoperability](https://www.graalvm.org/reference-manual/polyglot-programming/) with other languages in the GraalVM ecosystem.
 * [compatible](https://medium.com/graalvm/faster-r-with-fastr-4b8db0e0dceb#fff5): with the reference R implementation including the [R extensions C API](https://cran.r-project.org/doc/manuals/r-release/R-exts.html)
 * [embeddable](https://github.com/graalvm/examples/tree/master/r_java_embedding): allowing integration using the R embedding API or the GraalVM polyglot embedding SDK for Java
 
 
 The screenshot below shows Java application with embedded FastR engine.
 The plot below was generated by `ggplot2` running on FastR and it shows
 peak performance of the [raytracing example](http://www.tylermw.com/throwing-shade/).
-The measurements were [reproduced independently](https://nextjournal.com/sdanisch/fastr-benchmark).
+The measurements were [reproduced independently](https://web.archive.org/web/20181017111641/https://nextjournal.com/sdanisch/fastr-benchmark).
 
 ![Java embedding](documentation/assets/javaui.png)
 ![Speedup](documentation/assets/speedup.png)
 
  ## <a name="getting_started"></a>Getting Started
-See the documentation on the GraalVM website on how to [get GraalVM](https://www.graalvm.org/docs/getting-started/) and [install and use FastR](http://www.graalvm.org/docs/reference-manual/languages/r/).
+See the documentation on the GraalVM website on how to [get GraalVM](https://www.graalvm.org/docs/getting-started/) and [install and use FastR](https://www.graalvm.org/reference-manual/r/).
 
 ```
 $ $GRAALVM/bin/R
@@ -54,7 +54,7 @@ fast as GNU-R/Rcpp and sometimes even faster because of the advanced optimizatio
 
 ## Documentation
 
-The reference manual for FastR, which explains its advantages, its current limitations, compatibility and additional functionality is available on the [GraalVM website](http://www.graalvm.org/docs/reference-manual/languages/r/).
+The reference manual for FastR, which explains its advantages, its current limitations, compatibility and additional functionality is available on the [GraalVM website](https://www.graalvm.org/reference-manual/r/).
 
 Further documentation, including contributor/developer-oriented information, is in the [documentation folder](documentation/Index.md) of this repository.
 
@@ -65,7 +65,7 @@ The discussion on [Slack](https://www.graalvm.org/slack-invitation/) is a good w
 
 We would like to grow the FastR open-source community to provide a free R implementation atop the Truffle/Graal stack.
 We encourage contributions, and invite interested developers to join in.
-Prospective contributors need to sign the [Oracle Contributor Agreement (OCA)](http://www.oracle.com/technetwork/community/oca-486395.html).
+Prospective contributors need to sign the [Oracle Contributor Agreement (OCA)](https://oca.opensource.oracle.com/).
 The access point for contributions, issues and questions about FastR is the [GitHub repository](https://github.com/oracle/fastr).
 
 ## Authors

documentation/dev/building.md

@@ -238,7 +238,7 @@ mx eclipseinit
 
 We would like to grow the FastR open-source community to provide a free R implementation atop the Truffle/Graal stack.
 We encourage contributions, and invite interested developers to join in.
-Prospective contributors need to sign the [Oracle Contributor Agreement (OCA)](http://www.oracle.com/technetwork/community/oca-486395.html).
+Prospective contributors need to sign the [Oracle Contributor Agreement (OCA)](https://oca.opensource.oracle.com/).
 The access point for contributions, issues and questions about FastR is the [GitHub repository](https://github.com/oracle/fastr).
 
 ## Troubleshooting

documentation/user/README.md

@@ -25,7 +25,7 @@ The R language home directory, which will be further referenced as `$R_HOME`, is
 
 ## Prerequisites
 
-GraalVM's R runtime requires [zlib](https://zlib.net/) and the [OpenMP runtime library](https://www.openmprtl.org/).
+GraalVM's R runtime requires [zlib](https://zlib.net/) and the [OpenMP runtime library](https://www.openmp.org).
 Zlib is default part of MacOS and most modern Linux distributions.
 The following commands should install the OpenMP runtime library: