title: Unable to tag SCM when preparing a release using maven-release-plugin
body: <p>I'm having trouble preparing a release of my project using the maven release plugin.</p>
  
  <p>SCM connection:</p>
  
  <pre><code>&lt;scm&gt;
      &lt;connection&gt;scm:svn:https://subversion.assembla.com/svn/myrepo&lt;/connection&gt;
      &lt;developerConnection&gt;
          scm:svn:https://subversion.assembla.com/svn/myrepo
      &lt;/developerConnection&gt;
  &lt;/scm&gt;
  </code></pre>
  
  <p>Release plugin config:</p>
  
  <pre><code>&lt;plugin&gt;
      &lt;groupId&gt;org.apache.maven.plugins&lt;/groupId&gt;
      &lt;artifactId&gt;maven-release-plugin&lt;/artifactId&gt;
      &lt;version&gt;2.3.2&lt;/version&gt;
      &lt;configuration&gt;
          &lt;autoVersionSubmodules&gt;true&lt;/autoVersionSubmodules&gt;
          &lt;providerImplementations&gt;
              &lt;svn&gt;javasvn&lt;/svn&gt;
          &lt;/providerImplementations&gt;
      &lt;/configuration&gt;
      &lt;dependencies&gt;
          &lt;dependency&gt;
              &lt;groupId&gt;com.google.code.maven-scm-provider-svnjava&lt;/groupId&gt;
              &lt;artifactId&gt;maven-scm-provider-svnjava&lt;/artifactId&gt;
              &lt;version&gt;2.0.3&lt;/version&gt;
          &lt;/dependency&gt;
      &lt;/dependencies&gt;
  &lt;/plugin&gt;
  </code></pre>
  
  <p>All goes well until the SCM needs to be tagged:</p>
  
  <pre><code>Failed to execute goal org.apache.maven.plugins:maven-release-plugin:2.3.2:prepare (default-cli) on project myproject: Unable to tag SCM
  Provider message:
  SVN tag failed.
  Command output:
  svn: E175002: unknown host
  svn: E175002: OPTIONS request failed on '/svn/myrepo'
  </code></pre>
  
  <p>Any ideas?</p>