StrBufAppendBufPlain(pref_name, HKEY(":"), 0);
StrBufAppendBufPlain(pref_name, key, keylen, 0);
set_preference_backend(SKEY(pref_name), 0, value, PRF_STRING, save_to_server, NULL);
StrBufAppendBufPlain(pref_name, HKEY(":"), 0);
StrBufAppendBufPlain(pref_name, key, keylen, 0);
set_preference_backend(SKEY(pref_name), 0, value, PRF_STRING, save_to_server, NULL);