merge after importing pf from openbsd 3.6. (userland part)

some files were imported to the different places from the previous version.
v3_5:
etc/pf.conf
etc/pf.os
etc/spamd.conf
share/man/man4/p

merge after importing pf from openbsd 3.6. (userland part)

some files were imported to the different places from the previous version.
v3_5:
etc/pf.conf
etc/pf.os
etc/spamd.conf
share/man/man4/pf.4
share/man/man4/pflog.4
share/man/man5/pf.conf.5
share/man/man5/pf.os.5
share/man/man5/spamd.conf.5
v3_6:
dist/pf/etc/pf.conf
dist/pf/etc/pf.os
dist/pf/etc/spamd.conf
dist/pf/share/man/man4/pf.4
dist/pf/share/man/man4/pflog.4
dist/pf/share/man/man5/pf.conf.5
dist/pf/share/man/man5/pf.os.5
dist/pf/share/man/man5/spamd.conf.5

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