Comma separated lists parameters

[junghao]

Queries like this

https://service.geonet.org.nz/fdsnws/dataselect/1/query?network=NZ&cha=HHZ&loc=10,20&starttime=2011-03-20T06:15:00.000&endtime=2011-03-20T06:20:00.000&sta=WEL

Should get result with location 10 and 20. But now it's failing.

FDSN specification:

• network RequiredSelect one or more network codes. Can be SEED network codes or data center defined codes. Multiple codes are comma-separated.
• station Required Select one or more SEED station codes. Multiple codes are comma-separated.
• location Required Select one or more SEED location identifiers. Multiple identifiers are comma- separated. As a special case “--“ (two dashes) will be translated to a string of twospace characters to match blank location IDs.
• channel Required Select one or more SEED channel codes. Multiple codes are comma-separated.

[salichon]

FYI @rumachan