Add license (BSD 3-Clause)

License the project under the BSD 3-Clause because we've copied the
documentation from `sysexits.h`.

1 files changed, 31 insertions, 0 deletions

diff --git a/src/package.lisp b/src/package.lisp
index 73011ec..6d57e22 100644
--- a/src/package.lisp
+++ b/src/package.lisp
@@ -1,3 +1,34 @@
+;;; Copyright (c) 2021  Teddy Wing
+;;;
+;;; 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.
+;;;
+;;; 3. Neither the name of the copyright holder nor the names of its
+;;;    contributors may be used to endorse or promote products derived
+;;;    from this software without specific prior written permission.
+;;;
+;;; 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.
+
 (defpackage :sysexits
   (:use :cl)