* doc/install.texi (Configuration): Fix markup.
(Specific, i?86-*-udk): Likewise.
(Specific, alpha*-dec-osf*): Warn against --with-gnu-as,
--with-gnu-ld.
Document --enable-threads and --enable-libgcj status.
(Specific, mips-sgi-irix*): Canonicalize triples.
(Specific, mips-sgi-irix5): Warn about problems with this config.
Mention required GNU as patch.
Native assembler problems are fixed.
(Specific, mips-sgi-irix6): Update O32 ABI support status.
Document --enable-threads and --enable-libgcj status.
From-SVN: r44599
