Feature #934

- Feature #934, supports 'reserved.lines' to indicate a multi-line prompt for
  use in conjunction with 'limit:page' (thanks to Robert Gill).
- Removed 'locale' from the taskrc.5 man page.
- Added verbosity token 'sync'.
- Fixed bug in size calculation for 'limit:page', but there is still one more.
- Corrected unit test limit.t given the above fix.

src/commands/CmdShow.cpp

@@ -178,6 +178,7 @@ int CmdShow::execute (std::string& output)
     " recurrence.indicator"
     " recurrence.limit"
     " regex"
+    " reserved.lines"
     " row.padding"
     " rule.precedence.color"
     " search.case.sensitive"