Download patch
ref: c740374d0d6fa4da5768457edb804f073f506f9e parent: 43e22aa2ae51c403fdead4112e4afe184ef6d12e author: qwx <qwx@sciops.net> date: Sat Aug 22 20:16:21 EDT 2020
add rabin-karp string search, including optimized variant