[#3991] Some improvements

Author: fxdupont

src/lib/asiolink/unix_domain_socket.cc

@@ -36,7 +36,7 @@ class UnixDomainSocketImpl : public boost::enable_shared_from_this<UnixDomainSoc
         try {
             close();
         } catch (...) {
-            // catch all exceptions.
+            // Catch and ignore all exceptions.
         }
     }
 

src/lib/dns/labelsequence.cc

@@ -286,7 +286,7 @@ LabelSequence::toRawText(bool omit_final_dot) const {
     // use for integrity check
     unsigned int labels = getLabelCount();
     // init with an impossible value to catch error cases in the end:
-    // cppcheck complains this value is never used...
+    // cppcheck-suppress unreadVariable
     unsigned int count = Name::MAX_LABELLEN + 1;
 
     // result string: it will roughly have the same length as the wire format
@@ -341,7 +341,7 @@ LabelSequence::toText(bool omit_final_dot) const {
     // use for integrity check
     unsigned int labels = getLabelCount();
     // init with an impossible value to catch error cases in the end:
-    // cppcheck complains this value is never used...
+    // cppcheck-suppress unreadVariable
     unsigned int count = Name::MAX_LABELLEN + 1;
 
     // result string: it will roughly have the same length as the wire format

src/lib/util/unlock_guard.h

@@ -36,7 +36,7 @@ class UnlockGuard : public boost::noncopyable {
         try {
             lock_.lock();
         } catch (...) {
-            // catch all exceptions.
+            // Catch and ignore all exceptions.
         }
     }