doc: add main functions doxygen headers.

Signed-off-by: Emmanuel Roullit <emmanuel.roullit@gmail.com>
doc: add help functions doxygen headers.

Signed-off-by: Emmanuel Roullit <emmanuel.roullit@gmail.com>
dabba: constify mput_char() argument.

Signed-off-by: Emmanuel Roullit <emmanuel.roullit@gmail.com>
doc: add capabilities CLI function doxygen headers.

Signed-off-by: Emmanuel Roullit <emmanuel.roullit@gmail.com>
doc: fix typo within doxygen headers.

Signed-off-by: Emmanuel Roullit <emmanuel.roullit@gmail.com>
doc: add coalesce CLI function doxygen headers.

Signed-off-by: Emmanuel Roullit <emmanuel.roullit@gmail.com>
dabba: mark rpc_interface_coalesce_modify() static.

Signed-off-by: Emmanuel Roullit <emmanuel.roullit@gmail.com>