templater: introduce startswith function This function returns a string only if it starts with a given string. It is particularly useful when combined with splitlines and/or used with conditionals that fail when empty strings are passed in to take action based on the contents of a line.

templatefilter: add splitlines function This is useful for applying changes to each line, and it's especially powerful when used in conjunction with conditionals to modify lines based on content.

serve: tidy up indent level of repository not found message

serve: inline checkrepo() that is used only when --stdio is specified Since e811b93f2cb1, --cmdserver is allowed to start without repository, so checkrepo() function is meaningless.

serve: make sure to print "listening at" message immediately If stdout is piped, status message won't be flushed until client connects to the server and access log is written to stdout. It seems bad idea to queue start-up banner of server process.

merge with stable

match: make glob '**/' match the empty string Previously, a glob pattern of the form 'foo/**/bar' would match 'foo/a/bar' but not 'foo/bar'. That was because the '**' in 'foo/**/bar' would be translated to '.*', making the final regex pattern 'foo/.*/bar'. That pattern doesn't match the string 'foo/bar'. This is a bug because the '**/' glob matches the empty string in standard Unix shells like bash and zsh. Fix that by making the ending '/' optional if an empty string can be matched.