DEVEL15-windows-callback-getcellservdb-20080111

DEVEL15-windows-callback-getcellservdb-20080111

LICENSE MIT

Add support for RXAFS_GetCellServDB.  Implemented by generalizing
RXAFS_GetCellByNum and special casing the index values to do the
right thing.

Conditionalize grabbing the callp->lock in the callback functions.
The race conditions in rx have long since been fixed and the potential
for deadlocks are too great.

Add a new flag CM_FLAG_NOPROBE for use in calls to cm_GetCell.  When
set the newly discovered servers will not be immediately probed.  Useful
when setting tokens, setting server preferences, or responding to cmdebug
callbacks.

(cherry picked from commit ae9dc9ad4ddd8313d24e457faf48bc15ccd2c86c)