mdsplus8 and alpha: the "dir" command of "mdstcl" crashes when working with deep trees that have long paths about mdsplus HOT 3 OPEN

Additional testing indicates that the buffer overflow occurs when the full path (less the leaf node) is 125 visible characters. (There are also some new line characters, thus the total output message exceeds 128 characters.)

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Investigation reveals that there are two bugs in the tcl/tcl_directory.c file.

The buffer overflow occurs when the path length (plus new line characters) exceeds the msg buffer size. This buffer should be increased in both branches: alpha and mdsplus8.
line 177

In the mdsplus8 branch, there is an additional problem because the node name size is specified incorrectly. The node names only have 63 visible characters (i.e., the trailing null character should not be included).
line 133
line 138

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Clarification: IMAS and OMAS are abstraction layers above MDSplus and other data stores. Thus, it is unlikely that full IMAS and OMAS paths will be mirrored directly in MDSplus.

However, when designing new MDSplus trees, it is possible that some nodes in the tree will use similar names in order to simplify the mapping from MDSplus to IMAS / OMAS. Thus, those new trees will likely encounter this mdstcl buffer overflow bug.

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