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, 2 insertions, 2 deletions

diff --git a/src/wallet/rpcdump.cpp b/src/wallet/rpcdump.cpp
index 71fd973581..4e1f6548df 100644
--- a/src/wallet/rpcdump.cpp
+++ b/src/wallet/rpcdump.cpp
@@ -585,13 +585,13 @@ UniValue importwallet(const JSONRPCRequest& request)
                 std::string strLabel;
                 bool fLabel = true;
                 for (unsigned int nStr = 2; nStr < vstr.size(); nStr++) {
-                    if (boost::algorithm::starts_with(vstr[nStr], "#"))
+                    if (vstr[nStr].front() == '#')
                         break;
                     if (vstr[nStr] == "change=1")
                         fLabel = false;
                     if (vstr[nStr] == "reserve=1")
                         fLabel = false;
-                    if (boost::algorithm::starts_with(vstr[nStr], "label=")) {
+                    if (vstr[nStr].substr(0,6) == "label=") {
                         strLabel = DecodeDumpString(vstr[nStr].substr(6));
                         fLabel = true;
                     }