Custom Doxygen license and licenseblock/endlicenseblock commands

Doxyfile

ALIASES += license="\par License^^"                                   
ALIASES += license{1}="\par \1\n"                                     
ALIASES += licenseblock="\par License^^\parblock^^"                   
ALIASES += licenseblock{1}="\par \1^^\parblock^^"                     
ALIASES += endlicenseblock="\endparblock^^"                           

examples.h

/*! @file examples.h
 *
 * Produces implicit "License" title and indented notice of license:
 *
 * @license Licensed under the Apache License, Version 2.0 (see LICENSE.txt).
 *
 * Produces explicit "Zero-Clause BSD (0BSD)" title with inline license text:
 *
 * @license{Zero-Clause BSD (0BSD)}
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted.
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
 * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 *
 * @note There can't be any blank lines in the license text when using the
 *       simple \@license command. (See \@licenseblock below for the solution.)
 *
 * Produces implicit "License" title and inline, multi-paragraph license text:
 *
 * @licenseblock
 * Licensed under the zlib/libpng License (Zlib).
 *
 * See the LICENSE.txt file in this distribution, or the original license text
 * at https://opensource.org/licenses/Zlib.
 * @endlicenseblock
 *
 * Produces explicit "The MIT License" title and inline, multi-paragraph text:
 *
 * @licenseblock{The MIT License}
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to
 * deal in the Software without restriction, including without limitation the
 * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
 * sell copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
 * IN THE SOFTWARE.
 * @endlicenseblock
 */