profile-manual: Updates to the LTTng Documentation section.

The LTTng Documentation website has been updated to actually
have extensive documentation now.  Previously, in the profile-manual,
we were stating that documentation did not exist, which was true
at the time of writing.  I updated the section to link to the
main LTTng documentation website and altered some other text in
the section appropriately.

Additionally, I found and corrected a couple spelling errors in
this chapter.

(From yocto-docs rev: c56dab059b6edc02ffa2406b8e51c591e20fbe65)

Signed-off-by: Scott Rifenbark <scott.m.rifenbark@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

documentation/profile-manual/profile-manual-usage.xml

@@ -842,7 +842,7 @@
                 idea.  One of the first projects to do this was IBM's DProbes
                 dpcc compiler, an ANSI C compiler which targeted a low-level
                 assembly language running on an in-kernel interpreter on the
-                target system.  This is exactly analagous to what Sun's DTrace
+                target system.  This is exactly analogous to what Sun's DTrace
                 did, except that DTrace invented its own language for the purpose.
                 Systemtap, heavily inspired by DTrace, also created its own
                 one-off language, but rather than running the product on an
@@ -1275,7 +1275,7 @@
             </para>
 
             <informalexample>
-                <emphasis>Tying it Together:</emphasis> The trace events subsystem accomodate static
+                <emphasis>Tying it Together:</emphasis> The trace events subsystem accommodate static
                 and dynamic tracepoints in exactly the same way - there's no
                 difference as far as the infrastructure is concerned.  See the
                 ftrace section for more details on the trace event subsystem.
@@ -3258,15 +3258,25 @@
         <title>Documentation</title>
 
         <para>
-            There doesn't seem to be any current documentation covering
-            LTTng 2.0, but maybe that's because the project is in transition.
-            The LTTng 2.0 website, however, is here:
+            You can find the primary LTTng Documentation on the
+            <ulink url='https://lttng.org/docs/'>LTTng Documentation</ulink>
+            site.
+            The documentation on this site is appropriate for intermediate to
+            advanced software developers who are working in a Linux environment
+            and are interested in efficient software tracing.
+        </para>
+
+        <para>
+            For information on LTTng in general, visit the
             <ulink url='http://lttng.org/lttng2.0'>LTTng Project</ulink>
+            site.
+            You can find a "Getting Started" link on this site that takes
+            you to an LTTng Quick Start.
         </para>
 
         <para>
-            You can access extensive help information on how to use the
-            LTTng plug-in to search and analyze captured traces via the
+            Finally, you can access extensive help information on how to use
+            the LTTng plug-in to search and analyze captured traces via the
             Eclipse help system:
             <literallayout class='monospaced'>
      Help | Help Contents | LTTng Plug-in User Guide