LRU cache - call cleanup after 'put' and allow capacity-sized cache

 - this makes intention clearer

src/service/cfgapi/cfgapi.cpp

@@ -862,8 +862,6 @@ bool CfgFactory::load_settings () {
             NbrHood::instance().cache().set_capacity(static_cast<size_t>(nbr_cache_size));
         }
 
-
-
         if(int open_timeout = 0; load_if_exists(cfgapi.getRoot()["settings"]["tuning"], "host_open_timeout", open_timeout)) {
             baseHostCX::params.open_timeout = open_timeout;
         }

src/utils/lru.hpp

@@ -62,7 +62,7 @@ class LRUCache {
     }
 
     void cleanup_ul() {
-        while(cache_.size() >= capacity_) {
+        while(cache_.size() > capacity_) {
             if(cache_.size() > 0L) {
                 Key oldestKey = lruList.back();
                 lruList.pop_back();
@@ -76,15 +76,15 @@ class LRUCache {
 
     void put_ul(const Key& key, Value const& value) {
 
-        cleanup_ul();
-
         if (auto it = cache_.find(key); it != cache_.end()) {
             lruList.erase(it->second.second);
             cache_.erase(it);
         }
 
         lruList.push_front(key);
         cache_[key] = {value, lruList.begin()};
+
+        cleanup_ul();
     }
 
     std::string to_string(int verbosity) const {