[8/8] webservices: Implement WsSetInputToBuffer.

[Marvin]

Hi,

While running your changed tests on Windows, I think I found new failures.
Being a bot and all I'm not very good at pattern recognition, so I might be
wrong, but could you please double-check?
Full results can be found at
https://testbot.winehq.org/JobDetails.pl?Key=17568

Your paranoid android.


=== w7u (32 bit reader) ===
reader.c:1390: Test failed: wrong data L"valueest"

=== w864 (32 bit reader) ===
reader.c:1390: Test failed: wrong data L"valueP\5868P"

=== w1064 (32 bit reader) ===
reader.c:1390: Test failed: wrong data L"valuez\c5d8z\2980z\2980z\2980z\26b8z\2980z\2980z\2980z\2980z\2980z\26b8z\2980z\2980z\2980z\2980z\2980z\2980z\2980z\2980z\2980z\2980z\2980z\2980z\2980z\2980z\2980z\2980z\2980z\26b8z\70d3\6a13\e609"

=== w7pro64 (64 bit reader) ===
reader.c:1390: Test failed: wrong data L"value]"

=== w864 (64 bit reader) ===
reader.c:1390: Test failed: wrong data L"valueU"

=== w1064 (64 bit reader) ===
reader.c:1390: Test failed: wrong data L"value0"