w32: Use CSIDL_COMMON_APPDATA instead of /etc
* src/hwfeatures.c [W32]: Include shlobj.h (_gcry_get_sysconfdir): New. (get_hwf_deny_file): New. Use this instead of the HWF_DENY_FILE macro. * src/fips.c (get_fips_force_file): New. Use this instead of FIPS_FORCE_FILE. (_gcry_initialize_fips_mode) [W32]: Do not parse files under "/proc". * random/random.c (get_random_conf_file): New. Use instead of RANDOM_CONF_FILE macro.