Merge the following from the English version:

1.144 -> 1.146 books/handbook/ports/chapter.sgml

Submitted by: Ryusuke Suzuki <ryusuke at nucl dot sci dot hokudai dot ac dot jp>
Reviewed by: Hiroo Ono <hiroo at oikumene dot gcd dot org>, hrs
Reference: [doc-jp-work 975, 981, 982, 983]