ER: Add command-line option to strip some of the "info" fields.

[IAXES]

Would there be any opposition to me filing a pull request for an extra option to filter some of the data included in the --info field that is included in the final output (ie: my_installer.run)? One thing I'd like to remove is the fields showing the full command used to generate the installer, which includes the full path to the source locations (ie: my home folder). I'd like to strip those out of "production" installers. In my case, I'd like to prevent the following from appearing in a production installer:

	echo Built with Makeself version 2.3.0 on 
	echo Build command was: "./makeself.sh \\
    \"/home/ford_prefect/installer\" \\
    \"/home/ford_prefect/installer.run\" \\
    \"42\" \\
    \"./42.sh\""

[megastep]

No objection from me, feel free!

[wjlester]

Was something like this ever merged? Recent updates include sensitive data in the --info command such as GPG and SSL passphrases. It seems as if it would be appropriate to omit the "Build command was:" line in makeself-header.sh until a sanitized version can be displayed.

[megastep]

I don't remember seeing a pull request for this and it's quite possible it was closed without it being proposed. However I'd be OK with having a command-line option to makeself to prevent the build command from being stored in the archive.