[ADD] rvm_maintenance

[eliph]

{
"name": "rvm_maintenance",
"stable": {
"version": "0.5",
"downloadUrlPhp": "https://vanmelick.com/txp/rvm_maintenance.php",
"phpHasManifest": 1
}
}

Administration reference (submitter to leave as-is)

• JSON added to repo & verified
• Create or verify author on site
• Article published