it's a regular expression, not shell pattern. empty match will
match everything (default is ^user\\.)

Do not add prepare() to new APKBUILDs in the future, as this
functionality is superseded by the addition of the default prepare
patcher in abuild.

A majority of APKBUILDs currently use exactly the prepare() provided by
newapkbuild verbatim, even for packages where no patches exist, which
has created the expectation that patches listed as sources are applied
by default.

This rev simply adds that default prepare() to abuild (and exposes it as
default_prepare), with no configurability. If needed, default behaviour
can be overridden by providing explicitly prepare().

For git repositories the $reporev variable is not really used since the
$_rev variable is passed to git and $_rev was only set when $reporev was
empty.

The snapshot function was indented with spaces while the rest of the
code is indented with tabs.

instead of forking stat once force every file with one file argument,
we fork it once with all the files as arg. This reduces number of forks.

we should not compress man pages that are already compressed.