Konstantin Belousov 7a7e609a32 Apparently, both nfs clients do not use cache_enter_time()
consistently, creating some namecache entries without NCF_TS flag.
This causes panic due to failed assertion.

As a temporal relief, remove the assert. Return epoch timestamp for
the entries without timestamp if asked.

While there, consolidate the code which returns timestamps, into a
helper cache_out_ts().

Discussed with:	 jhb
MFC after: 2 weeks
2012-01-23 17:09:23 +00:00
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