fix building with --disable-messages

git-svn-id: https://gnunet.org/svn/libmicrohttpd@34686 140774ce-b5e7-0310-ab8b-a85725594a96
daemon.c: update ifdefs to support non-MinGW w32 native build
tsearch.c/.h: support compiling by MSVC
platform.h: define ssize_t for MSVC compiler
platform.h: conditionally include unistd.h
Was already supported by configure
daemon.c: Fix macro check with HAVE_ACCEPT4 == 0 in MHD_accept_connection()
Replace strcasecmp/strncasecmp with platform-independent macros
[w32] Add W32 emulation for snprintf()
Replace snprintf with platform-independent macro
response.c: include additional header for W32
Replace char variable size arrays with malloc'ed buffers
Rework _MHD_EXTERN definition for VS project
MHD_get_version: support extraction version number from MHD_VERSION if PACKAGE_VERSION is not defined
[w32] Help code to detect IPPROTO_IPV6 on VC
[W32] Initial VS2013 project files
Add and use header for multiplatform support of Init/Deinit functions