[openssl-dev] Fixing some warnings when compiling on non-posix systems.

I do not know if someone really cares about this, but I have compiled openssl-1.0.2-stable-SNAP-20170602 using the DJGPP port of gcc-7.1.0. The code has been configured using --strict-warnings option. At least the following issues have appeared. Using the DJGPP port of gcc means that the code

[openssl-dev] [PATCH] Some DJGPP specific fixes and improvements for OpenSSL_1_0_2-stable.

I do not know if patches for DJGPP/FreeDOS are still welcome at all for the OpenSSL 1.0.2 branch but if yes, then I would like to propose some fixes and improvements. No one of the proposed changes have impact on any other port. The patch is based on openssl-1.0.2-stable-SNAP-20170602.