[Language > FunC > Functions] Missing links after edit

[jeshecdom]

After the fix, the following links are still missing, since it is unknown where this should be referenced in the current docs. All these refer to the /language/func/special-functions.mdx document.

• Missing links to pages explaining internal and external messages:

  The recv_internal function is invoked when a smart contract receives an inbound [internal message](...).
  The recv_external function handles inbound [external messages](...).

• Missing link explaining "external messages cannot carry coins":

  The only difference is that msg_value is always 0, since [external messages cannot carry coins](...)

• Missing link explaining the tick and tock transactions:

  The run_ticktock triggers when [tick and tock transactions](...) occur

• Missing link explaining the split prepare transaction and that it is currently not in use (old doc: https://docs.ton.org/v3/documentation/data-formats/layout/transactions#split-prepare):

  The split_prepare would trigger when a [split prepare transaction](...) occurs. Even though the split_prepare name is currently reserved, split prepare transactions are [currently not in use](...).

• Missing link explaining the split install transaction and that it is currently unavailable. (old doc: https://docs.ton.org/v3/documentation/data-formats/layout/transactions#split-install):

  The split_install would trigger when a [split install transaction](...) occurs. Even though the split_install name is currently reserved, split install transactions are [currently unavailable](...).

• Add link to DROP instruction. The DROP instruction currently missing in /tvm/instructions.

  to spend gas by explicitly executing a [DROP](...) instruction when recv_internal finishes.