Remove description "ifconfig_IF_aliasN is deprecated".  While this sentence was added in 2005, many users still need it.
Remove description "ifconfig_IF_aliasN is deprecated".  While this
sentence was added in 2005, many users still need it.

Approved by:	re (gjb)
PR:		docs/162354

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase