Change README http: to https: as needed.

README.md

@@ -1,8 +1,8 @@
-Assign, part of collection of the [Boost C++ Libraries](http://github.com/boostorg), makes it easy to fill containers with data by overloading operator() and operator()().
+Assign, part of collection of the [Boost C++ Libraries](https://github.com/boostorg), makes it easy to fill containers with data by overloading operator() and operator()().
 
 ### License
 
-Distributed under the [Boost Software License, Version 1.0](http://www.boost.org/LICENSE_1_0.txt).
+Distributed under the [Boost Software License, Version 1.0](https://www.boost.org/LICENSE_1_0.txt).
 
 ### Properties
 
@@ -27,8 +27,8 @@ Distributed under the [Boost Software License, Version 1.0](http://www.boost.org
 
 ### More information
 
-* [Ask questions](http://stackoverflow.com/questions/ask?tags=c%2B%2B,boost,boost-assign)
+* [Ask questions](https://stackoverflow.com/questions/ask?tags=c%2B%2B,boost,boost-assign)
 * [Report bugs](https://github.com/boostorg/assign/issues): Be sure to mention Boost version, platform and compiler you're using. A small compilable code sample to reproduce the problem is always good as well.
-* Submit your patches as pull requests against **develop** branch. Note that by submitting patches you agree to license your modifications under the [Boost Software License, Version 1.0](http://www.boost.org/LICENSE_1_0.txt).
-* Discussions about the library are held on the [Boost developers mailing list](http://www.boost.org/community/groups.html#main). Be sure to read the [discussion policy](http://www.boost.org/community/policy.html) before posting and add the `[assign]` tag at the beginning of the subject line.
+* Submit your patches as pull requests against **develop** branch. Note that by submitting patches you agree to license your modifications under the [Boost Software License, Version 1.0](https://www.boost.org/LICENSE_1_0.txt).
+* Discussions about the library are held on the [Boost developers mailing list](https://www.boost.org/community/groups.html#main). Be sure to read the [discussion policy](https://www.boost.org/community/policy.html) before posting and add the `[assign]` tag at the beginning of the subject line.