www/groupoffice: Update from 6.2.72 to 6.2.73

Changelog:
https://sourceforge.net/p/group-office/code/HEAD/tree/branches/groupoffice-6.2/www/CHANGELOG.TXT

Approved by: xxx (mentor)
#Differential Revision: https://reviews.freebsd.org/Dxxxxx

.www/groupoffice: portlint -AC [19:30:03]
WARN: Makefile: for new port, make $FreeBSD$ tag in comment section empty, to make SVN happy.
WARN: Makefile: "RESTRICTED" found. do not forget to update ports/LEGAL.
0 fatal errors and 2 warnings found.

#PHP56
11.1-amd64
11.1-i386

#PHP7.0
11.1-amd64-PHP70
11.1-i386-PHP70

#PHP7.1
11.1-amd64-PHP71
11.1-i386-PHP71

#PHP7.2
11.1-amd64-PHP72
11.1-i386-PHP72