databases/influxdb: add MANPAGES option

[joneum]

Summary

• databases/influxdb: add MANPAGES option

PR: 217592
Reported by: xmj
Approved by: girgen (maintainer) xxx (mentor)
#Differential Revision: https://reviews.freebsd.org/Dxxxxx

Test Plan

~/dev/ports/databases/influxdb % portlint -AC
WARN: Makefile: [24]: the arguments to ONLY_FOR_ARCHS are not sorted. Please consider sorting them.
WARN: Makefile: [0]: possible direct use of command "install" found. use ${INSTALL_foobaa} instead.
WARN: Makefile: possible use of absolute pathname "/var/db/${PORTNAME}/".
WARN: Makefile: possible use of absolute pathname "/var/log/${PORTNAME}...".
WARN: Makefile: possible use of absolute pathname "/var/run/${PORTNAME}...".
WARN: Makefile: for new port, make $FreeBSD$ tag in comment section empty, to make SVN happy.
WARN: Makefile: new ports should not set PORTREVISION.
WARN: /usr/home/joneum/dev/ports/databases/influxdb/distinfo: [1]: TIMESTAMP is over 30 days old
0 fatal errors and 8 warnings found.

poudriere testport:

10amd64
10i386
11amd64
11i386
12.0-CURRENT r318899 amd64
12.0-CURRENT r318400 i386

[mat]

databases/influxdb/Makefile

95

missing empty line before this.

[miwi]

Please fix the empty line

[joneum]

add empty line