[Bug 254887] Add for touch (tp) change created time (btime)

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=254887

            Bug ID: 254887
           Summary: Add for touch (tp) change created time (btime)
           Product: Base System
           Version: 13.0-STABLE
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: kern
          Assignee: bugs at FreeBSD.org
          Reporter: akw24542 at eoopy.com

Description:
FreeBSD 13 supports 3 timestamps (atime, mtime, and btime). touch utility can
change atime and mtime with this command.

atime = touch -a
mtime = touch -m

But support for btime is missing.


Steps to reproduce:

1) Create a .txt file. Then open the .txt file and edit the .txt file and save.
Now have 3 different timestamps for atime, mtime and btime.


stat -f "Accessed (atime): %Sa%nModified (mtime): %Sm%nCreated  (btime): %SB"
'/home/liveuser/Desktop/123.txt' 
Accessed (atime): Apr 08 10:37:48 2021
Modified (mtime): Apr 08 09:27:47 2021
Created  (btime): Apr 06 19:26:34 2021

2) Change with touch -> btime


3) This is not possible because there is no touch command that can change
btime.


Expectation:
touch supports changing btime. The command to change btime could be: touch -b

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