Escape package registry information to reduce unreadable files

[gep13]

When creating a registry backup, it is possible that Chocolatey creates a file that looks like this:

<?xml version="1.0" encoding="utf-8"?>
<registrySnapshot xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <user>S-1-5-21-2882331601-3999307508-2126793871-124194</user>
  <keys>
    <key installerType="Msi" displayName="ApplicationABC" displayVersion="1.2.3.4">
      <RegistryView>Registry64</RegistryView>
      <KeyPath>HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{AB12C345-D6EF-78GH-9123-IJ4456KL7M89}</KeyPath>
      <DefaultValue />
      <InstallLocation><![CDATA[C:\Program Files\ApplicationABC]]></InstallLocation>
      <UninstallString><![CDATA[]]></UninstallString>
      <HasQuietUninstall>false</HasQuietUninstall>
      <Publisher><![CDATA[ApplicationABC]]></Publisher>
      <InstallDate>20171109</InstallDate>
      <InstallSource><![CDATA[C:\Users\bob\AppData\Local\Temp\chocolatey\mia3\]]></InstallSource>
      <Language>1033</Language>
      <Version>1234</Version>
      <VersionMajor>1</VersionMajor>
      <VersionMinor>2</VersionMinor>
      <SystemComponent>true</SystemComponent>
      <WindowsInstaller>true</WindowsInstaller>
      <NoRemove>true</NoRemove>
      <NoModify>true</NoModify>
      <NoRepair>true</NoRepair>
      <ReleaseType />
      <ParentKeyName />
      <LocalPackage><![CDATA[C:\Windows\Installer\1da27cf2.msi]]></LocalPackage>
    </key>
    <key installerType="Unknown" displayName="ApplicationABC 1.2.3.4 x64 (Remove only)S$�&#x1E;�&#x6;&#x1A;" displayVersion="1.2.3.4">
      <RegistryView>Registry32</RegistryView>
      <KeyPath>HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\ApplicationABC 1.2.3.4 x64</KeyPath>
      <DefaultValue />
      <InstallLocation><![CDATA[C:\Program Files\ApplicationABC]]></InstallLocation>
      <UninstallString><![CDATA["C:\ProgramData\{4FAD6CA6-67F3-45F7-85AE-E9B62FDF0BAD}\ApplicationABCInstaller.exe" REMOVE=TRUE MODIFY=FALSE]]></UninstallString>
      <HasQuietUninstall>false</HasQuietUninstall>
      <Publisher><![CDATA[ApplicationABC]]></Publisher>
      <InstallDate />
      <InstallSource><![CDATA[]]></InstallSource>
      <Language />
      <Version />
      <VersionMajor>1</VersionMajor>
      <VersionMinor>2</VersionMinor>
      <SystemComponent>false</SystemComponent>
      <WindowsInstaller>false</WindowsInstaller>
      <NoRemove>false</NoRemove>
      <NoModify>true</NoModify>
      <NoRepair>true</NoRepair>
      <ReleaseType />
      <ParentKeyName />
    </key>
  </keys>
</registrySnapshot>

The additional characters in the Display Name are causing problems when trying to load the registry snapshot again