API strjoin

Joins strings together with a delimiter.
 joinedString = strjoin (delimiter, string1 [, ...])
 = string.join(delimiter, string1 [, ...]) 
==Arguments==
:; delimiter: - The delimiter to insert between each string being joined.
:; string1, ...: - One or more strings to join.
==Returns==
:; joinedString: - A string containing all the string arguments with the delimiter between each one.
==Example==
 a = strjoin("/", "HE", "LL", "O")
 print(a) -- HE/LL/O
==Patch changes==