Use C standard compliant format specs in wprintf functions

Use C standard compliant format specs in wprintf functions

- Use %ls for wchar_t * and %hs for char * variables

This makes it possible to build correctly with or without
__USE_MINGW_ANIS_STDIO defined. When this define is not used
all printf/scanf family functions are resolved from the windows
runtime MSVCRT.  Newer (since version 8) mingw-w64 versions have
started automatically enabling this macro under some feature
sets such as _GNU_SOURCE and C99.

The changes should not affect MSVC builds as Windows support
these format specifications.

Signed-off-by: Selva Nair <selva.nair@gmail.com>
Acked-by: Lev Stipakov <lstipakov@gmail.com>
Message-Id: <20210522033232.20548-2-selva.nair@gmail.com>
URL: https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg22436.html
Signed-off-by: Gert Doering <gert@greenie.muc.de>