Fix dissection of GTP MM Context RAND field.

As suggested by Lükő Bálint to fix bug #9722.

Change-Id: I177f7632a0936f105b1acff5e7c20bcce2328957
Reviewed-on: https://code.wireshark.org/review/109
Reviewed-by: Pascal Quantin <pascal.quantin@gmail.com>
Tested-by: Pascal Quantin <pascal.quantin@gmail.com>
Fix bug 9720 'Lua: bitop library is missing in Lua 5.2'

In Lua 5.2 the bitop library is missing - it's not getting loaded into
the lua global table as "bit", or anything else for that matter.  Lua
5.2 has its own bit-operations library ("bit32") which is there, but
that one's not as good as bitop and would break back/forward
compatibility for lua scripts anyway.

Change-Id: I94b7d45bbeb2f637d1c76b0b5c9d8472eebfcaea
Reviewed-on: https://code.wireshark.org/review/100
Reviewed-by: Evan Huus <eapache@gmail.com>
Tested-by: Evan Huus <eapache@gmail.com>
Reviewed-by: Stig Bjørlykke <stig@bjorlykke.org>
Fix wslua docs script to handle module names with digits, like Int64/UInt64

The fix in commit 28e028ddd5579c3d405b21523cdc2773c798e32f missed the module
name, which was only grabbing alphabetic characters not numbers. This fixes
that oversight.

Change-Id: I65a87279024a81b33a8deb83b7a3573ea6eaf139
Reviewed-on: https://code.wireshark.org/review/117
Reviewed-by: Evan Huus <eapache@gmail.com>
Tested-by: Evan Huus <eapache@gmail.com>
Fix Bug 9725 'Lua: ProtoField.new() is buggy'

Using ProtoField.new() is dicey.  Many of the optional arguments don't properly check the lua stack - they call lua_isnil() for their index number, instead of lua_gettop() to see the stack size.  lua_isnil() may return false in such cases.

Change-Id: I83ca1e5fc34e71ec35899adbedabcee69571b9fe
Reviewed-on: https://code.wireshark.org/review/118
Reviewed-by: Stig Bjørlykke <stig@bjorlykke.org>
Tested-by: Stig Bjørlykke <stig@bjorlykke.org>