Give some routines used for info levels that appear both in set and get

Give some routines used for info levels that appear both in set and get
names beginning with dissect_qspi_, and give some of them names with the
info level structure in them rather than the SNIA CIFS specification
section number.

Have separate routines for SMB_INFO_STANDARD and SMB_INFO_QUERY_EA_SIZE;
SMB_INFO_STANDARD is specified differently in the SNIA CIFS
specification and the MS-CIFS specification, and some captures have the
SNIA CIFS version, with the EA length and some have the MS-CIFS version
without it.  The dissector for SMB_INFO_STANDARD will dissect it if it's
there and not say "this structure is truncated" if it's not there.

Rename dissect_qfi_SMB_FILE_ALTERNATE_NAME_INFO() to
dissect_qfi_SMB_FILE_NAME_INFO(), as it also dissects
SMB_QUERY_FILE_NAME_INFO.

Merge the dissectors for SMB_FILE_ALLOCATION_INFO and
SMB_SET_FILE_ALLOCATION_INFO, and for SMB_FILE_END_OF_FILE_INFO and
SMB_SET_FILE_END_OF_FILE_INFO, as the structures are the same.

Dissect some presumed "passthrough info levels" the same way the
corresponding official SMB infos are dissected.

Expand some comments for info level dissectors to give the MS-CIFS
section number and to give some other details.

If an info level is truncated, put in an expert info error.

If we don't know about a given info level, just dissect the body as
"Information level unknown", rather than having it dissected as an
"unknown information" trailer.

git-svn-id: http://anonsvn.wireshark.org/wireshark/trunk@37297 f5534014-38df-0310-8fa8-9805f1628bb7