Updated links in README.txt.

Author: drunken-monkey

Diff for: README.txt

@@ -36,7 +36,7 @@ INSTALLATION
 ------------
 Install as you would normally install a contributed Drupal module. For further
 information, see:
-   https://www.drupal.org/node/1897420
+   https://www.drupal.org/docs/8/extending-drupal-8/installing-modules
 
 CONFIGURATION
 -------------
@@ -56,8 +56,8 @@ configured to be indexed. More details are available online in the handbook [4].
 There, you can also find answers to frequently asked questions and common
 pitfalls to avoid.
 
-[3] https://www.drupal.org/node/1254698
-[4] https://www.drupal.org/node/1251246
+[3] https://www.drupal.org/docs/8/modules/search-api/getting-started/server-backends-and-features
+[4] https://www.drupal.org/docs/8/modules/search-api/getting-started
 
 DEVELOPERS
 ----------
@@ -97,13 +97,13 @@ framework.
 
 The handbook documentation for developers is available at [5].
 
-[5] https://www.drupal.org/node/2001110
+[5] https://www.drupal.org/docs/8/modules/search-api/developer-documentation
 
 To know which parts of the module can be relied upon as its public API, please
 read the "Drupal 8 backwards compatibility and internal API policy" [6] and the
 module's issue regarding potential module-specific changes to that policy [7].
 
-[6] https://www.drupal.org/node/2562903
+[6] https://www.drupal.org/core/d8-bc-policy
 [7] https://www.drupal.org/node/2871549
 
 MAINTAINERS