Added public files
Roughly added all public files. Probably missed some, though.
diff --git a/doc/efun/regexp_package b/doc/efun/regexp_package
new file mode 100644
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+++ b/doc/efun/regexp_package
@@ -0,0 +1,48 @@
+SYNOPSIS
+ #include <regexp.h>
+
+ int regexp_package()
+
+DESCRIPTION
+ Return which regexp package is used by default:
+
+ RE_TRADITIONAL: traditional regexps
+ RE_PCRE: PCRE
+
+ As the package can be selected at runtime through the
+ REGEXP_PACKAGE driver hook, there is no good way to determine
+ the package at LPC compile time.
+ Match the pattern <pattern> (interpreted according to <opt> if
+ given) against all strings in list, and return a new array with all
+ strings that matched.
+
+ If there is an error in the regular expression, a runtime
+ error will be raised.
+
+EXAMPLE
+ string strs;
+ string pattern;
+
+ if (regexp_package() == RE_PCRE)
+ pattern = "\\<help\\>.*\\<me\\>";
+ else
+ pattern = "\\bhelp\\b.*\\bme\\b";
+
+ if (strs = regexp( ({"please, help me Sir John."}),
+ , pattern
+ ))
+ {
+ if (sizeof(strs)
+ write("It matches.\n");
+ }
+
+ The regular expression will test the given string (which is
+ packed into an array) if there is something like "help ... me"
+ inside of it.
+
+HISTORY
+ Introduced in LDMud 3.3.634.
+
+SEE ALSO
+ regexp(E), regexplode(E), regmatch(E), regreplace(E), sscanf(E),
+ regexp(C), regexp_package(H)