Copyright for ruby-icalendar source package in Focal

Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
Upstream-Name: icalendar
Source: https://github.com/icalendar/icalendar

Files: *
Copyright: Ryan Ahearn
License: GPL-2 or BSD-2-Clause or RubyLicense

Files: lib/icalendar/tzinfo.rb
Copyright: 2008 Sean Dague
License: GPL-2 or BSD-2-Clause or RubyLicense

Files: debian/*
Copyright: 2018 Pirate Praveen 
License: GPL-2 or BSD-2-Clause or RubyLicense
Comment: the Debian packaging is licensed under the same terms as the original package.

License: GPL-2 or BSD-2-Clause or RubyLicense
 Ruby is copyrighted free software by Yukihiro Matsumoto .
 .
 As of Ruby 1.9.3, the Ruby Language went from a Dual GPL/Ruby license
 to Dual BSD/Ruby license. The intent of the icalendar license is that
 it is provided under the same terms as Ruby itself. The way we're
 going to interpret this is the software can be redistributed under any
 of the 3 licenses, GPL, BSD, or the conditions below, at your option:
 .
   1. You may make and give away verbatim copies of the source form of the
      software without restriction, provided that you duplicate all of the
      original copyright notices and associated disclaimers.
 .
   2. You may modify your copy of the software in any way, provided that
      you do at least ONE of the following:
 .
	a) place your modifications in the Public Domain or otherwise
	   make them Freely Available, such as by posting said
	   modifications to Usenet or an equivalent medium, or by allowing
	   the author to include your modifications in the software.
 .
	b) use the modified software only within your corporation or
	   organization.
 .
	c) rename any non-standard executables so the names do not conflict
	   with standard executables, which must also be provided.
 .
	d) make other distribution arrangements with the author.
 .
   3. You may distribute the software in object code or executable
      form, provided that you do at least ONE of the following:
 .
	a) distribute the executables and library files of the software,
	   together with instructions (in the manual page or equivalent)
	   on where to get the original distribution.
 .
	b) accompany the distribution with the machine-readable source of
	   the software.
 .
	c) give non-standard executables non-standard names, with
	   instructions on where to get the original software distribution.
 .
	d) make other distribution arrangements with the author.
 .
   4. You may modify and include the part of the software into any other
      software (possibly commercial).  But some files in the distribution
      are not written by the author, so that they are not under this terms.
      They are gc.c(partly), utils.c(partly), regex.[ch], fnmatch.[ch],
      glob.c, st.[ch] and some files under the ./missing directory.  See
      each file for the copying condition.
 .
   5. The scripts and library files supplied as input to or produced as 
      output from the software do not automatically fall under the
      copyright of the software, but belong to whomever generated them, 
      and may be sold commercially, and may be aggregated with this
      software.
 .
   6. THIS SOFTWARE IS PROVIDED "AS IS" AND WITHOUT ANY EXPRESS OR
      IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
      WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
      PURPOSE.
 .
 -- 
 On Debian GNU/Linux systems, the complete text of the GNU General
 Public License can be found in `/usr/share/common-licenses/GPL-2'.
 .
 -- 
 BSD-2-clause license text:
 .
 Redistribution and use in source and binary forms, with or without
 modification, are permitted provided that the following conditions are met:
 .
 1) Redistributions of source code must retain the above copyright notice,
 this list of conditions and the following disclaimer.
 .
 2) Redistributions in binary form must reproduce the above copyright notice,
 this list of conditions and the following disclaimer in the documentation
 and/or other materials provided with the distribution.
 .
 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
 LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 POSSIBILITY OF SUCH DAMAGE.