Fix spelling errors

Most errors found with:

codespell -L cach,thst,odly,aslo,parm,parms,inpu,ges,prset,pevent,ptd,pring,valu,noo,noe,ned,inout,ro,siz,froms,nd,fo,singl,sart,multy,tthe,allong,ment,inate,nodel,tring,alse,ture,thi,wille,numer

Some more manually found (its -> it's)

c++20: Do not use apostrophe (e.g. can't) in unquoted #error message

modules/libcom/src/misc/ipAddrToAsciiAsynchronous.cpp

@@ -155,7 +155,7 @@ void ipAddrToAsciiEngine::cleanup()
     ipAddrToAsciiEnginePrivate::pEngine = 0;
 }
 
-// for now its probably sufficent to allocate one
+// for now its probably sufficient to allocate one
 // DNS transaction thread for all codes sharing
 // the same process that need DNS services but we
 // leave our options open for the future