sysutils/initool: add new port

Initool lets you manipulate the contents of INI files from the
command line. It is a rewrite of an earlier program by the same
developer called "iniparse". Rather than modify INI files in place
like iniparse, however, it prints the modified contents to standard
output.

PR: 272351
Submitted by: Jesús Daniel Colmenares Oviedo <DtxdF@disroot.org>