MapCache docs: Probably outdated XML tag <wmsparams>

[schmandr]

The MapCache docs describe a probably outdated XML tag <wmsparams> in

MapServer-documentation/en/mapcache/config.txt

Line 95 in d50c1a5

location where the service can be accessed; and `<wmsparams>` is a list of

Meanwhile the example snippet above that paragraph uses a <params> tag.

[jmckenna]

thanks for the report @schmandr !