ln(1) needs -L and -P argument options per XPG7

[Garrett D'Amore]

The ln(1) command needs to support -L and -P for POSIX 2008 compliance. This controls whether AT_SYMLINK_FOLLOW is present.

[Garrett D'Amore]

fixes #71 link(1M) and link(2) should have POSIX behavior fixes #72 ln(1) needs -L and -P argument options per XPG7

→ <<cset dd7732652e91>>

[Garrett D'Amore]

fixes #71 link(1M) and link(2) should have POSIX behavior fixes #72 ln(1) needs -L and -P argument options per XPG7

→ <<cset ffa282a46555>>