SpamAssassain - Header and body test - Validate record with javascript before submission

[shoulders]

SYSTEM INFORMATION
OS type and version	Ubuntu Linux 22.04.5
Usermin version	2.102
Virtualmin version	7.20.2 Pro
Theme version	21.20.7
Apache version	2.4.52
Package updates	49 package updates are available

Background

• This takes the idea of #957 further
• I understand that this is only low priority as is the related issue, but I have put this here for reference as it is directly related.

The issue

You are able to make and submit rules that do no follow the required convention

https://spamassassin.apache.org/full/3.1.x/doc/Mail_SpamAssassin_Conf.html

Test names must not start with a number, and must contain only alphanumerics and underscores. It is suggested that lower-case characters not be used, and names have a length of no more than 22 characters, as an informal convention. Dashes are not allowed.

Proposed solution

Use JavaScript to enforce the correct syntax.