added some context set functions to the man page

doc/getdns_context_set.3.in

@@ -32,11 +32,14 @@
 .B getdns_context_set_context_update_callback, 
 .B getdns_context_set_dns_root_servers, 
 .B getdns_context_set_dns_transport, 
+.B getdns_context_set_dnssec_trust_anchors, 
+.B getdns_context_set_dnssec_allowed_skew,
 .B getdns_context_set_follow_redirects, 
 .B getdns_context_set_limit_outstanding_queries, 
 .B getdns_context_set_namespaces, 
 .B getdns_context_set_resolution_type, 
-.B getdns_context_set_timeout
+.B getdns_context_set_suffix, 
+.B getdns_context_set_timeout, 
 -- getdns context manipulation routines
 
 .SH LIBRARY
@@ -45,6 +48,15 @@ DNS Resolver library (libgetdns, -lgetdns)
 .SH SYNOPSIS
 #include <getdns.h>
 
+getdns_return_t 
+.br
+.B getdns_context_set_append_name
+(getdns_context_t context,
+.RS 3
+.br
+getdns_append_name_t when_to_append)
+.RE
+
 getdns_return_t 
 .br
 .B getdns_context_set_context_update_callback
@@ -72,6 +84,22 @@ getdns_return_t
 uint16_t transport)
 .RE
 
+getdns_return_t
+.br
+.B getdns_contet_set_dnssec_allowed_skew
+(getdns_context *context,
+.RS 3
+uint32_t skew_seconds)
+.RE
+
+getdns_return_t
+.br
+.B getdns_contet_set_dnssec_trust_anchors
+(getdns_context *context,
+.RS 3
+getdns_list *trust_anchors)
+.RE
+
 getdns_return_t 
 .br
 .B getdns_context_set_follow_redirects
@@ -109,6 +137,14 @@ getdns_return_t
 uint16_t restype)
 .RE
 
+getdns_return_t
+.br
+.B getdns_context_set_suffix
+(getdns_context *context,
+.RS 3
+getdns_list *suffixes)
+.RE
+
 getdns_return_t 
 .br
 .B getdns_context_set_timeout
@@ -122,6 +158,11 @@ uint16_t timeout)
 .LP
 These functions are used to manipulate a previously allocated and initialized context, see getdns_context (3) for more details on the functions used to allocate, initialized and destroy contexts and for a more detailed discussion of the getdns_context in general.
 
+.LP
+.B getdns_context_set_append_name
+Specifies whether to append a suffix supplied via getdns_context_set_suffix (3)
+to the query string before the API starts resolving a name.
+
 .LP
 .B getdns_context_set_context_update_callback
 sets a function that will be called if changes to the system files (for example /etc/resolv.conf and /etc/hosts).
@@ -131,6 +172,14 @@ sets a function that will be called if changes to the system files (for example
 specifies the transport used for DNS lookups, the default is to use UDP and fall back to
 TCP as needed.
 
+.LP
+.B getdns_context_set_dnssec_trust_anchors
+allows the caller to specify trust anchors as alternatives to the default trust anchors
+
+.LP
+.B getdns_context_set_dnssec_allowed_skew
+set the number of seconds skew allowed in either direction when checking an RRSIGs expiration and inception fields, the default is 0.
+
 .LP
 .B getdns_context_set_limit_outstanding_queries
 specifies the maximum number of outstanding DNS queries, the API will queue queries
@@ -159,6 +208,11 @@ files.  Future implementations will support netbios, mdns, and nis.
 .B getdns_context_set_resolution_type
 specifies whether DNS queries are performed with non-recursive lookups or as a stub resolver.
 
+.LP
+.B getdns_context_set_suffix
+Append suffixes to domain names prior to executing the lookup based on
+getdns_context_set_append_name. 
+
 .LP
 .B getdns_context_set_timeout
 specifies the number of milliseconds the API will wait for a response.
@@ -208,11 +262,31 @@ The namespaces array contains an ordered list of namespaces that will be queried
 .RP
 can be set to either GETDNS_CONTEXT_RECURSIVE (the default) or GETDNS_CONTEXT_STUB (requires that forwarders be specified by the caller).
 
+.HP 3
+.I seconds_skew
+.RP
+the number of seconds skew allowed in either direction when checking an RRSIGs expiration and inception fields.
+
+.HP 3
+.I suffixes
+.RP
+A list of bindatas that are strings that are to be appended based on getdns_context_set_append_name. The values here follow the rules in section 2.1 of RFC 4343 to allow non-ASCII octets and special characters in labels.
+
 .HP 3
 .I timeout
 .RP
 the number of milliseconds the API will wait for a response, after which the callback will be invoked (or the synchronous function will return) with a timeout error.
 
+.HP 3
+.I trust_anchors
+.RP
+list of bindatas that are the DNSSEC trust anchors expressed as RDATA from the DNSKEY resource records, the default are supplied by the IANA root.
+
+.HP 3
+.I when_to_append
+.RP
+The value is GETDNS_APPEND_NAME_ALWAYS, GETDNS_APPEND_NAME_ONLY_TO_SINGLE_LABEL_AFTER_FAILURE, GETDNS_APPEND_NAME_ONLY_TO_MULTIPLE_LABEL_NAME_AFTER_FAILURE, or GETDNS_APPEND_NAME_NEVER.
+
 .HP
 .SH "RETURN VALUES"