used to select the use of the SRW protocol, as determined from
get_sru_mode_from_string() in yaz/src/zoom-c.c
This resolves a long-standing conflict between the documentation for
pazpar2 and MKAdmin.
It has four possible settings.
'get', enables SRU access through GET requests. 'post' enables SRU/POST
support, less commonly supported, but useful if very large requests are
- to be submitted. 'srw' enables the SRW (SRU over SOAP) variation of
+ to be submitted. 'soap' enables the SRW (SRU over SOAP) variation of
the protocol.
</para>
<para>