docs: Formatting issue on Agent page

[assareh]

1. on https://www.vaultproject.io/docs/agent, there seems to be a markdown formatting issue:

[Auto-Auth][autoauth]
[Caching][caching]
[Templating][template]

not clear if these were intended to be links, or formatted in some way.

2. on https://www.vaultproject.io/docs/secrets/databases/mssql.html#amazon-rds, in the Amazon RDS section, accomodated should be accommodated

3. on https://www.vaultproject.io/docs/enterprise/control-groups#vault-enterprise-control-group-support, the page is titled Vault Enterprise Control Group Support. it seems like it should be titled Vault Enterprise Control Groups.

4. on https://www.vaultproject.io/docs/secrets/transform#masking, the sentence "This form of transformation is non-reversible and thus does no support..." should be "This form of transformation is non-reversible and thus does not support..."