Add Jan Beich (myself) to ports developers

[jbeich]

Summary

Add Jan Beich (myself) to ports developers

Changes per Committer's Guide:

• List myself as a committer
• Add my GPG public key
• Add my author entity
• Add a news entry

#Differential Revision: https://reviews.freebsd.org/D???

Test Plan

$ make install -C /usr/ports/textproc/docproj

$ make ENGLISH_ONLY=1 FORMATS=html-split
$ firefox en_US.ISO8859-1/articles/contributors/staff-committers.html
$ firefox en_US.ISO8859-1/articles/pgpkeys/pgpkeys-developers.html

Using the key have sent signed mail to bapt and flo.

$ make -C en_US.ISO8859-1/htdocs/news
$ firefox en_US.ISO8859-1/htdocs/news/newsflash.html

[flo]

Approved.

[jbeich]

Closed by commit rD46219 (authored by @jbeich).