Removes Boost predicate.hpp dependency

This is a squashed commit that squashes the following commits:

This commit removes the `boost/algorithm/string/predicate.hpp` dependenc
from the project by replacing the function calls to `boost::algorithm::starts_with`
`boost::algorithm::ends_with` and `all` with respectively C++11'
`std::basic_string::front`, `std::basic_string::back`, `std::all_of` function calls

This commit replaces `boost::algorithm::is_digit` with  a locale independent isdigi
function, because the use of the standard library's `isdigit` and `std::isdigit
functions is discoraged in the developer notes

1 files changed, 15 insertions, 0 deletions

diff --git a/src/test/util_tests.cpp b/src/test/util_tests.cpp
index d535f74e9..3661c762f 100644
--- a/src/test/util_tests.cpp
+++ b/src/test/util_tests.cpp
@@ -806,6 +806,21 @@ BOOST_AUTO_TEST_CASE(gettime)
     BOOST_CHECK((GetTime() & ~0xFFFFFFFFLL) == 0);
 }
 
+BOOST_AUTO_TEST_CASE(test_IsDigit)
+{
+    BOOST_CHECK_EQUAL(IsDigit('0'), true);
+    BOOST_CHECK_EQUAL(IsDigit('1'), true);
+    BOOST_CHECK_EQUAL(IsDigit('8'), true);
+    BOOST_CHECK_EQUAL(IsDigit('9'), true);
+
+    BOOST_CHECK_EQUAL(IsDigit('0' - 1), false);
+    BOOST_CHECK_EQUAL(IsDigit('9' + 1), false);
+    BOOST_CHECK_EQUAL(IsDigit(0), false);
+    BOOST_CHECK_EQUAL(IsDigit(1), false);
+    BOOST_CHECK_EQUAL(IsDigit(8), false);
+    BOOST_CHECK_EQUAL(IsDigit(9), false);
+}
+
 BOOST_AUTO_TEST_CASE(test_ParseInt32)
 {
     int32_t n;