Regenerate the patch in arcanist format.

Remove changes from reverted commit.

In D12697#263905, @mat wrote:

It might be a better idea to fold all this in the USES=scons section in the USES chapter.

• Replace 'gzipped' with compressed when appropriate

• Remove phrase 'bloat in the master source repository' as a leftover from the cvs times
• Remove phrase about 'automatically determining of closet master site...', it was in planing phase for more than 15 years
• Replace 'gzipped' with compressed when appropriate
• Update url for backup master site
• Fix typo: s/otn/from/
• Remove reference to DATA option

• Replace 'gzipped' with compressed
• Use USES=autoreconf instead of deprecated USE_AUTOTOOLS

• Use check-plist instead of check-orphans as more preferred target
• Update package format to pkgng one

• Add CHANGES entry

• Remove whitespace changes
• Add quotes

Because of name collision, that change masks potential shebang error in devel/plan9port which depends on shells/rc (plan9-like shell) which provides bin/rc.
It's one obscure port, so I guess that change is ok, but it would be nice to at least add comment about this potential issue.

Looks good for me.

It's no longer true since r209460 (for ~6.5 years).
Right now I586_CPU is mostly about 0xf00f bug:

Shouldn't you also free newfs_arg and mount_arg ?

• Don't check for valid fstype, rely on mount(8) for this
• Update -T option description