Move license note about previous http parser to README.md

Fixes geventhttpclient#210

Author: ml31415

LICENSE-MIT

@@ -0,0 +1,22 @@
+This software is licensed under the MIT License.
+
+Copyright Antonin Amand <[email protected]>, 2018.
+
+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.

LICENSE.txt

@@ -174,3 +174,11 @@ for mor details. Also note, HTTPX is better be used with asyncio, not gevent.
 | Httpx              | 770.3  |
 
 *Linux(x86_64), Python 3.11.6 @ Intel i7-7560U*
+
+## License
+
+This package is distributed under the [MIT license](https://github.com/geventhttpclient/geventhttpclient/blob/master/LICENSE-MIT). 
+Previous versions of geventhttpclient used http_parser.c, which in turn 
+was based on `src/http/ngx_http_parse.c` from NGINX, copyright Igor Sysoev, 
+Joyent, Inc., and other Node contributors. For more information, see 
+http://github.com/joyent/http-parser 

README.md

@@ -9,7 +9,7 @@ version = "2.2.0" # dont forget to update version __init__.py as well
 description = "HTTP client library for gevent"
 readme = "README.md"
 requires-python = ">=3.9"
-license = {file = "LICENSE.txt"}
+license = {file = "LICENSE-MIT"}
 keywords = ["http", "gevent", "client"]
 authors = [{name = "Antonin Amand", email = "[email protected]"}]
 classifiers = [