Update some doxygen links to local refs (#3814)

doxygen/dox/LearnBasics2.dox

@@ -728,12 +728,12 @@ There are numerous datatype functions that allow a user to alter a pre-defined d
 Refer to the \ref H5T in the \ref RM. Example functions are #H5Tset_size and #H5Tset_precision.
 
 \section secLBDtypeSpec Specific Datatypes
-On the <a href="https://portal.hdfgroup.org/display/HDF5/Examples+by+API">Examples by API</a>
-page under <a href="https://confluence.hdfgroup.org/display/HDF5/Examples+by+API#ExamplesbyAPI-datatypes">Datatypes</a>
+On the \ref ExAPI
+page under \ref sec_exapi_dtypes
 you will find many example programs for creating and reading datasets with different datatypes.
 
 Below is additional information on some of the datatypes. See
-the <a href="https://portal.hdfgroup.org/display/HDF5/Examples+by+API">Examples by API</a>
+the \ref ExAPI
 page for examples of these datatypes.
 
 \subsection subsecLBDtypeSpec Array Datatype vs Array Dataspace

doxygen/dox/LearnBasics3.dox

@@ -152,13 +152,13 @@ To use the compact storage layout, call: #H5Pset_layout
 \li Create a dataset with the modified property list. (See #H5Dcreate)
 \li Close the property list. (See #H5Pclose)
 For example code, see the \ref HDF5Examples page.
-Specifically look at the <a href="https://portal.hdfgroup.org/display/HDF5/Examples+by+API">Examples by API</a>.
+Specifically look at the \ref ExAPI.
 There are examples for different languages.
 
 The C example to create a chunked dataset is:
-<a href="https://support.hdfgroup.org/ftp/HDF5/examples/examples-by-api/hdf5-examples/1_8/C/H5D/h5ex_d_chunk.c">h5ex_d_chunk.c</a>
+<a href="https://github.com/HDFGroup/hdf5-examples/blob/master/C/H5D/h5ex_d_chunk.c">h5ex_d_chunk.c</a>
 The C example to create a compact dataset is:
-<a href="https://support.hdfgroup.org/ftp/HDF5/examples/examples-by-api/hdf5-examples/1_8/C/H5D/h5ex_d_compact.c">h5ex_d_compact.c</a>
+<a href="https://github.com/HDFGroup/hdf5-examples/blob/master/C/H5D/h5ex_d_compact.c">h5ex_d_compact.c</a>
 
 \section secLBDsetLayoutChange Changing the Layout after Dataset Creation
 The dataset layout is a Dataset Creation Property List. This means that once the dataset has been
@@ -290,7 +290,7 @@ is met, at a certain point in the future.)
 
 \subsection subsecLBContentsProgUsing Using #H5Literate, #H5Lvisit and #H5Ovisit
 For example code, see the \ref HDF5Examples page.
-Specifically look at the <a href="https://portal.hdfgroup.org/display/HDF5/Examples+by+API">Examples by API</a>.
+Specifically look at the \ref ExAPI.
 There are examples for different languages, where examples of using #H5Literate and #H5Ovisit/#H5Lvisit are included.
 
 The h5ex_g_traverse example traverses a file using H5Literate:

doxygen/dox/Overview.dox

@@ -23,8 +23,8 @@ documents cover a mix of tasks, concepts, and reference, to help a specific
 \par Versions
      Version-specific documentation (see the version in the title area) can be found
      here:
-     - <a href="https://docs.hdfgroup.org/hdf5/develop/index.html">HDF5 <code>develop</code> branch (this site)</a>
-     - <a href="https://docs.hdfgroup.org/hdf5/v1_14/index.html">HDF5 1.14.x</a>
+     - <a href="https://hdfgroup.github.io/hdf5/index.html">HDF5 <code>develop</code> branch (this site)</a>
+     - <a href="https://hdfgroup.github.io/hdf5/v1_14/index.html">HDF5 1.14.x</a>
      - <a href="https://docs.hdfgroup.org/hdf5/v1_12/index.html">HDF5 1.12.x</a>
      - <a href="https://docs.hdfgroup.org/hdf5/v1_10/index.html">HDF5 1.10.x</a>
      - <a href="https://docs.hdfgroup.org/hdf5/v1_8/index.html">HDF5 1.8.x</a>

doxygen/dox/ViewTools.dox

@@ -53,7 +53,7 @@ packages, which can be obtained from the <a href="https://portal.hdfgroup.org/di
 HDF5 files can be obtained from various places such as \ref HDF5Examples and <a href="http://www.hdfeos.org/">HDF-EOS and Tools and
 Information Center</a>. Specifically, the following examples are used in this tutorial topic:
 \li HDF5 Files created from compiling the \ref LBExamples
-\li HDF5 Files on the <a href="https://portal.hdfgroup.org/display/HDF5/Examples+by+API">Examples by API</a> page
+\li HDF5 Files on the \ref ExAPI page
 \li NPP JPSS files, <a href="https://support.hdfgroup.org/ftp/HDF5/examples/files/tutorial/SVM01_npp_d20130524_t1255132_e1256374_b08146_c20130524192048864992_noaa_ops.h5.gz">SVM01_npp.. (gzipped)</a>
 and <a href="https://support.hdfgroup.org/ftp/HDF5/examples/files/tutorial/SVM09_npp_d20120229_t0849107_e0854511_b01759_c20120229145452682127_noaa_ops.h5.gz">SVM09_npp.. (gzipped)</a>
 \li HDF-EOS <a href="https://support.hdfgroup.org/ftp/HDF5/examples/files/tutorial/OMI-Aura.he5">OMI-Aura file</a>
@@ -497,7 +497,7 @@ In the file shown below the dataset <code style="background-color:whitesmoke;">/
 \endcode
 
 You can obtain the <code style="background-color:whitesmoke;">h5ex_d_gzip.c</code> program that created this file, as well as the file created,
-from the <a href="https://portal.hdfgroup.org/display/HDF5/Examples+by+API">Examples by API</a> page.
+from the \ref ExAPI page.
 
 \subsection subsecViewToolsViewDset_h5ls h5ls
 Specific datasets can be specified with <code style="background-color:whitesmoke;">h5ls</code> by simply adding the dataset path and dataset after the
@@ -925,7 +925,7 @@ The output of the above command is shown below:
 
 \subsection subsecViewToolsViewDtypes_h5dump h5dump
 The following datatypes are discussed, using the output of <code style="background-color:whitesmoke;">h5dump</code> with HDF5 files from the
-<a href="https://portal.hdfgroup.org/display/HDF5/Examples+by+API">Examples by API</a> page:
+\ref ExAPI page:
 <ul>
 <li>@ref subsubsecViewToolsViewDtypes_array</li>
 <li>@ref subsubsecViewToolsViewDtypes_objref</li>
@@ -1036,7 +1036,7 @@ the elements or slab that is selected. A dataset with a Region Reference datatyp
 one or more Region References.
 
 An example of a Region Reference dataset (<code style="background-color:whitesmoke;">h5ex_t_regref.h5</code>) can be found on the
-<a href="https://portal.hdfgroup.org/display/HDF5/Examples+by+API">Examples by API</a> page,
+\ref ExAPI page,
 under Datatypes. If you examine this dataset with <code style="background-color:whitesmoke;">h5dump</code> you will see that <code style="background-color:whitesmoke;">/DS1</code> is a
 Region Reference dataset as indicated by its datatype, highlighted in bold below:
 \code

doxygen/dox/ViewTools2.dox

@@ -727,7 +727,7 @@ GROUP "/" {
 \endcode
 
 The second example imports string data. The example program that creates this file can be downloaded
-from the <a href="https://portal.hdfgroup.org/display/HDF5/Examples+by+API">Examples by API</a> page.
+from the \ref ExAPI page.
 
 Note that string data requires use of the <code style="background-color:whitesmoke;">h5dump -y</code>
 option to exclude indexes and the <code style="background-color:whitesmoke;">h5dump --width=1</code>