hgrc.5: do not turn random URLs into links URLs and email addresses are automatically turned into links. We don't want that when talking about example links and addresses.

hgrc.5: use enumerated list for email charsets

hgrc.5: order of email charsets is not a top level literal block - it belongs under email charsets, not email in general - enumerate order

sshrepo: move mkstemp() out of the try block, we don't use the exception simpler fix for 3b6f18851d87

minirst: update module docstring

commands: use enumerated lists in help texts

minirst: support enumerated lists