"max stat cache size" should be limited

[Bjoern JACKE]

Hi,

during a data migration where I had to copy some million files from a
samba server I saw the smbd process growing to several hundred
megabytes after some hours of copying. It looks like the problem is
"max stat cache size" being 0 (unlimited) by default. If I set this to
a reasonable value like 100 (100*1024 byte) smbd doesn't grow
unlimited anymore. How about changing this to maybe 100 by default?

Bjoern