[skip ci] Updated licenses and gitignores

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+The FreeBSD Documentation License
+
+Copyright 1994-2021 The FreeBSD Project. All rights reserved.
+
+Redistribution and use in source (SGML DocBook) and 'compiled' forms (SGML,
+HTML, PDF, PostScript, RTF and so forth) with or without modification, are
+permitted provided that the following conditions are met:
+
+1. Redistributions of source code (SGML DocBook) must retain the above copyright
+notice, this list of conditions and the following disclaimer as the first
+lines of this file unmodified.
+
+2. Redistributions in compiled form (transformed to other DTDs, converted
+to PDF, PostScript, RTF and other formats) 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 DOCUMENTATION IS PROVIDED BY THE FREEBSD DOCUMENTATION PROJECT "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 FREEBSD DOCUMENTATION PROJECT 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 DOCUMENTATION, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+Manual Pages
+
+Some FreeBSD manual pages contain text from the IEEE Std 1003.1, 2004 Edition,
+Standard for Information Technology — Portable Operating System Interface
+(POSIX®) specification. These manual pages are subject to the following terms:
+
+The Institute of Electrical and Electronics Engineers and The Open Group,
+have given us permission to reprint portions of their documentation.
+
+In the following statement, the phrase "this text" refers to portions of the
+system documentation.
+
+Portions of this text are reprinted and reproduced in electronic form in the
+FreeBSD manual pages, from IEEE Std 1003.1, 2004 Edition, Standard for Information
+Technology — Portable Operating System Interface (POSIX), The Open Group Base
+Specifications Issue 6, Copyright© 2001-2004 by the Institute of Electrical
+and Electronics Engineers, Inc and The Open Group. In the event of any discrepancy
+between these versions and the original IEEE and The Open Group Standard,
+the original IEEE and The Open Group Standard is the referee document. The
+original Standard can be obtained online at https://www.opengroup.org/membership/forums/platform/unix.
+
+    This notice shall appear on any product containing this material.