Fixing more doc links errors

Change-Id: I88f952bdc449e28782867edb75612cfd226b48fe
diff --git a/docs/build_images.md b/docs/build_images.md
index 8ca842b..91e5597 100644
--- a/docs/build_images.md
+++ b/docs/build_images.md
@@ -44,7 +44,7 @@
 
 The imagebuilder program performs the following steps when run:
 
- 1. Reads the [repo manifest file](https://gerrit.opencord.org/gitweb?p=manifest.git;a=blob;f=default.xml)
+ 1. Reads the [repo manifest file](https://github.com/opencord/manifest/blob/master/default.xml)
     (checked out as `.repo/manifest`) to get a list of the CORD git repositories.
 
  2. Reads the [build/docker_images.yml](https://github.com/opencord/cord/blob/{{ book.branch }}/docker_images.yml)
diff --git a/docs/install.md b/docs/install.md
index 48248d8..ae1e19f 100644
--- a/docs/install.md
+++ b/docs/install.md
@@ -78,7 +78,7 @@
 `xos` repo changeset 1234, revision 2.
 
 You can find the project path in the `repo` manifest file:
-[manifest/default.xml](https://gerrit.opencord.org/gitweb?p=manifest.git;a=blob;f=default.xml).
+[manifest/default.xml](https://github.com/opencord/manifest/blob/master/default.xml).
 
 You can also run make targets with the `-t` option; `-t build` is the same as
 running `cd ~/cord/build ; make -j4 build` after the rest of the installations
diff --git a/docs/install_virtual.md b/docs/install_virtual.md
index 4fee751..e0b6dcd 100644
--- a/docs/install_virtual.md
+++ b/docs/install_virtual.md
@@ -44,7 +44,7 @@
 This will provide you with a temporary target server meeting the above
 requirements.
 
-Refer to the [CloudLab documentation](https://docs.cloudlab.us) for more
+Refer to the [CloudLab documentation](http://docs.cloudlab.us) for more
 information.
 
 ## Building CiaB