Preview5 doc update. (#225) (#226)

Add Release notes for dotnet-dump.

Remove --add-source in installation instructions.

Author: mikem8361

documentation/dotnet-dump-instructions.md

@@ -7,7 +7,7 @@ The dotnet-dump CLI global tool is way to collect and analyze Windows and Linux
 
 The first step is to install the dotnet-dump CLI global tool. This requires the 2.1 .NET Core SDK to be installed. If you see the error message `Tool 'dotnet-dump' is already installed`, you will need to uninstall the global tool (see below). 
 
-    $ dotnet tool install -g dotnet-dump --version 1.0.3-preview5.19228.1 --add-source https://dotnetfeed.blob.core.windows.net/dotnet-core/index.json
+    $ dotnet tool install -g dotnet-dump --version 1.0.3-preview5.19228.1
     You can invoke the tool using the following command: dotnet-dump
     Tool 'dotnet-dump' (version '1.0.3-preview5.19228.1') was successfully installed.
 
@@ -109,3 +109,11 @@ To display the help:
 
     $ dotnet tool uninstall -g dotnet-dump
     Tool 'dotnet-dump' (version '1.0.3-preview5.19228.1') was successfully uninstalled.
+
+## Release Notes
+
+Preview5
+
+* dotnet-dump does not work on alpine and other MUSL based distros. Issue [#195](https://github.com/dotnet/diagnostics/issues/195).
+* dotnet-dump collect requires SYS\_PTRACE docker capabilities (--cap-add=SYS\_PTRACE or --privileged).
+* dotnet-dump analyze in Microsoft SDK docker images throws `Unhandled exception: System.DllNotFoundException: Unable to load shared library 'libdl.so' or one of its dependencies` exception. Issue [#201](https://github.com/dotnet/diagnostics/issues/201).

documentation/dotnet-trace-instructions.md

@@ -7,7 +7,7 @@ The dotnet-trace tool is a cross-platform CLI global tool that enables the colle
 The first step is to install the dotnet-trace CLI global tool. This requires at least version 2.1 of the SDK to be installed.
 
 ```cmd
-$ dotnet tool install --global dotnet-trace --version 1.0.3-preview5.19228.1 --add-source https://dotnetfeed.blob.core.windows.net/dotnet-core/index.json
+$ dotnet tool install --global dotnet-trace --version 1.0.3-preview5.19228.1
 You can invoke the tool using the following command: dotnet-trace
 Tool 'dotnet-trace' (version '1.0.3-preview5.19228.1') was successfully installed.
 ```

documentation/installing-sos-instructions.md

@@ -3,7 +3,7 @@ Installing SOS on Linux and MacOS
 
 The first step is to install the dotnet-sos CLI global tool. This requires the 2.1 .NET Core SDK to be installed. If you see the error message `Tool 'dotnet-sos' is already installed`, you will need to uninstall the global tool (see below). 
 
-    $ dotnet tool install -g dotnet-sos --version 1.0.3-preview5.19228.1 --add-source https://dotnetfeed.blob.core.windows.net/dotnet-core/index.json
+    $ dotnet tool install -g dotnet-sos --version 1.0.3-preview5.19228.1
     You can invoke the tool using the following command: dotnet-sos
     Tool 'dotnet-sos' (version '1.0.3-preview5.19228.1') was successfully installed.
 

documentation/installing-sos-windows-instructions.md

@@ -47,7 +47,7 @@ SOS will automatically be loaded from the internal Microsoft extension gallery.
 
 It is recommended that you update to the newer versions of the Windows debugger, but you can still use the latest SOS with older Windows debuggers by using the dotnet-sos CLI global tool to install. It is not as convenient. You may have to ".unload" the SOS that is loaded from the "runtime" directory.
 
-    C:\Users\mikem>dotnet tool install -g dotnet-sos --version 1.0.3-preview5.19228.1 --add-source https://dotnetfeed.blob.core.windows.net/dotnet-core/index.json
+    C:\Users\mikem>dotnet tool install -g dotnet-sos --version 1.0.3-preview5.19228.1
     You can invoke the tool using the following command: dotnet-sos
     Tool 'dotnet-sos' (version '1.0.3-preview5.19228.1') was successfully installed.
 
@@ -90,4 +90,4 @@ SOS will need to be loaded manually with the above ".load" command:
             [path: C:\Program Files\Debugging Tools for Windows (x64)\dbghelp.dll]
         ...
         ntsdexts: image 10.0.18317.1001, API 1.0.0,
-            [path: C:\Program Files\Debugging Tools for Windows (x64)\WINXP\ntsdexts.dll]
+            [path: C:\Program Files\Debugging Tools for Windows (x64)\WINXP\ntsdexts.dll]