Merged from trunk 5795:5804

Merged from trunk 5795:5804

add support for parsing of unicode quotes (SpankMan)

Ignore EEXIST from rmdir since some kernels (such as solaris) return
that instead of ENOTEMPTY.

Remove a stray print statement.  Thanks to Rick Warner in bug #125261.

fix format bug and mention default built_with_use behavior (SpankMan)

Add a warning about confcache to make.conf(5) (genone)

Catch EACCESS when running env-update, orignal patch by
<phajdan.jr@gmail.com> (bug #106061) (genone)

translate unicode quotes to ascii ones so we can keep our regex simple
(SpankMan)

svn path=/main/branches/prefix/; revision=5813