[skip ci] Updated licenses and gitignores

options/license/MMIXware

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+copyright 1999 Donald E. Knuth
+
+This file may be freely copied and distributed, provided that
+no changes whatsoever are made. All users are asked to help keep
+the MMIXware files consistent and ``uncorrupted,''
+identical everywhere in the world. Changes are permissible only
+if the modified file is given a new name, different from the names of
+existing files in the MMIXware package,
+and only if the modified file is clearly identified
+as not being part of that package.
+(The CWEB system has a ``change file'' facility by
+which users can easily make minor alterations without modifying
+the master source files in any way. Everybody is supposed to use
+change files instead of changing the files.)
+The author has tried his best to produce correct and useful programs,
+in order to help promote computer science research,
+but no warranty of any kind should be assumed.

options/license/URT-RLE

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+ * This software is copyrighted as noted below.  It may be freely copied,
+ * modified, and redistributed, provided that the copyright notice is
+ * preserved on all copies.
+ *
+ * There is no warranty or other guarantee of fitness for this software,
+ * it is provided solely "as is".  Bug reports or fixes may be sent
+ * to the author, who may or may not act on them as he desires.
+ *
+ * You may not include this software in a program or other software product
+ * without supplying the source, or without informing the end-user that the
+ * source is available for no extra charge.
+ *
+ * If you modify this software, you should include a notice giving the
+ * name of the person performing the modification, the date of modification,
+ * and the reason for such modification.