Add internal hyperlink targets for man pages and cross-reference them
using the any role reference. There are a number of alternatives to
accomplish this, but this seems like the combination that retains the
man page section number and the same boldface style in the man pages.
As a bonus, we get sanity checking on the links; for example
notmuch-search-terms.rst had a reference to notmuch-properties(1)
i.e. the wrong section.
The obvious semantic follow-up change would be to only have meaningful
"see also" references instead of having them all everywhere.
Using manpage role references generates helpful links in html
documentation, while retaining the same boldface style in the man
pages.
The external man page site is configurable. The Debian manpage site
seems like a good fit for Notmuch.
Make all parameter descriptions etc. use reStructuredText definition
lists with uniform style and indentation. Remove redundant indentation
from around the lists. Remove blank lines between term lines and
definition blocks. Use four spaces for indentation.
This is almost completely whitespace and paragraph reflow changes.
In most part, our .rst documents are indented with 8 spaces instead
of tabs. Bring the rest of the lines to the same format.
Also, on one (supposedly empty) line, trailing spaces were removed.
This is the output from sphinx-quickstart, massaged a bit, along with
our existing man pages converted to rst.
A skeleton notmuch-emacs manual is also included. It is not suitable
for end user use yet.
