Issue #880: Simple misspelling ('occured') in web error message.

Tweak finddate to pass date directly. Previous implementation was passing (date + "to" + date), which fails when "<" and friends are prepended to the date specifier. Signed-off-by: Mark Williamson <mark.williamson@cl.cam.ac.uk>

adding "prefix" option to "hg serve" (command line and [web] section) allows "hg serve" to serve from a different path than '/' (server root)

Fix XHTML validation error on file diff page. Replaces <div>, a block level element, with <span>, it's inline counterpart, in <pre>, which is also an inline element.

hook: redirect stdout to stderr for ssh and http servers

convert: add commandline.xargs(), use it in svn_sink class Introduce commandline.xargs() to limit argument list with respect to ARG_MAX bytes. If no ARG_MAX information available - use POSIX required minimum of 4096 bytes. Under Windows, while actual argument list length is limited to 32k, shells impose their own limits on command line length, down to 2047 bytes for cmd.exe under Windows NT/2k and about 2500 bytes for older 4nt.exe. See http://support.microsoft.com/kb/830473 for details about cmd.exe limitations. Since ARG_MAX is limit for argument list and environment, we reserve half of it and one byte for environment variables. This way with default ARG_MAX (4096 bytes) we get value 2047 bytes which is OK for Windows too.

keyword: fix some doc strings; update copyright

hg qrecord -- like record, but for mq I'm a former Darcs user, and I've discovered that it is very convenient to actually perform development using MQ first, and only when the patches are 'ready' move them to project's history in stone. Usually I work on some topic, temporarily forgetting about any version control, and just do coding, experimenting, debugging, etc. After some time, I approach a moment, where my work should actually go to patches/commits, and here is the problem:: As it is now, there is no way to put part of the changes into one patch, and another part of the changes into second patch. This works, but only when changes are touching separate files, and for semantically different changes touching the same file(s) there is now pretty way to put them into separate patches. For some time, I've tolerated the pain to run vim patches/... and move hunks between files by hand, but I think this affects my productivity badly. So, here is the first step towards untiing the problem: Let's use 'hg qrecord' for mq, like we use 'hg record' for usual commits!

cmdutil.commit: extract 'addremove' from opts carefully we are going to use cmdutil.commit for qrecord, and it's brother qrefresh does not support addremove.

dispatch: allow extensions to provide setup code we'll need this soon, when record extension will optionally depend on mq early -- when preparing cmdtable. Also, if accepted, ExtensionHowto wiki should be updated as well.