Merge -stable heads

Makefile: update "make clean" target after f91e5630ce7e

Merge with crew-stable

convert/svn: better handling of hg recursive call failure

schemes: url parts are counted from 1

Merge with -stable

subrepo: add default path to new clones

win32mbcs: fix typos and reST syntax

help/templates: use hanging indent for field list Now that the field list indentation is computed automatically, we no longer need to align all fields the same. Using a simple hanging indent makes it easy to edit the text in an editor like Emacs, which will automatically recognized the hang and keep it. The fields are still output with no blank lines between them.

minirst: improve layout of field lists Before, we used the padding following the key to compute where to wrap the text. Long keys would thus give a big indentation. It also required careful alignment of the source text, making it cumbersome to items to the list. We now compute the maximum key length and use that for all items in the list. We also put a cap on the indentation: keys longer than 10 characters are put on their own line. This is similar to how rst2html handles large keys: it uses 14 as the cutoff point, but I felt that 10 was better for monospaced text in the console.