New error message : setfsize ignored by nameserver because of concurrent file modification in another stager

Added last_mod_time parameter to setfsize*, replaceseg, replacetapecopy and setsegattr. Also checked for potential concurrent modifications of the files in these procedures, based on the last_mod_time and prevent the changes to take place when needed

Changed severity of the 'consume_thread: file opened in O_RDWR, skipping checksums' message from ERR to INFO

previously in BaseThreadPool. However it will be obsoleted soon...

the preexisting pools.

of the VMGR

vmgrmodifytape requires that the user at least passes the VID as a command-line
option.  Before this fix, the command would very confusingly say "Bad address",
no it says "no vid".  This fix is the same as just applied to vmgrmodifylibrary.

Code for a saner World!

of a tape library, where possible status values are ONLINE and OFFLINE.

Please not that the vmgr server does not yet take any action of the status
of a tape library.  Tobe continued...

0 = LIBRARY_ONLINE.

vmgr_srv_deletelibrary.  This function would always fail an attempt to delete
a drive, no matter if the request was valid.  Due to a lack of curly braces
the returning of the EEXIST error code was done no matter what.