samples: remove and/or change some wiki mentions

Cleaned some dead links. Replaced word wiki with
either docs or link to https://docs.asterisk.org/

Resolves: #974

configs/samples/chan_dahdi.conf.sample

@@ -595,7 +595,6 @@ usecallerid=yes
 ;     polarity    = polarity reversal signals the start
 ;     polarity_IN = polarity reversal signals the start, for India,
 ;                   for dtmf dialtone detection; using DTMF.
-; (see https://wiki.asterisk.org/wiki/display/AST/Caller+ID+in+India)
 ;     dtmf        = causes monitor loop to look for dtmf energy on the
 ;                   incoming channel to initate cid acquisition
 ;

configs/samples/extensions.conf.sample

@@ -549,7 +549,7 @@ exten => s,1,ChanIsAvail(${ARG1},s)			; s is for ANY call
 	same => n,GotoIf($["${AVAILSTATUS}" = "1"]?autoanswer:fail)
 	same => n(autoanswer),Set(_ALERT_INFO="RA")			; This is for the PolyComs
 	same => n,SIPAddHeader(Call-Info: Answer-After=0)	; This is for the Grandstream, Snoms, and Others
-	same => n,NoOp()					; Add others here and Post on the Wiki!!!!
+	same => n,NoOp()					; Add others here and Post on the Docs!!!!
 	same => n,Dial(${ARG1})
 	same => n(fail),Hangup()
 

configs/samples/pjsip.conf.sample

@@ -256,8 +256,8 @@
 ; At a basic level configure the endpoint with a transport that is set up
 ; with the appropriate NAT settings. There may be some additional settings you
 ; need here based on your NAT/Firewall scenario. Look to the CLI config help
-; "config show help res_pjsip endpoint" or on the wiki for other NAT related
-; options and configuration. We've included a few below.
+; "config show help res_pjsip endpoint" or on https://docs.asterisk.org/ for
+; other NAT related options and configuration. We've included a few below.
 ;
 ; AOR
 ;
@@ -418,7 +418,7 @@
 ;force_rport=yes
 ;rewrite_contact=yes  ; necessary if endpoint does not know/register public ip:port
 ;ice_support=yes   ;This is specific to clients that support NAT traversal
-                   ;for media via ICE,STUN,TURN. See the wiki at:
+                   ;for media via ICE,STUN,TURN. See the docs at:
                    ;https://docs.asterisk.org/Configuration/Miscellaneous/Interactive-Connectivity-Establishment-ICE-in-Asterisk/
                    ;for a deeper explanation of this topic.
 
@@ -1025,8 +1025,8 @@
 ;  authentication is not recommended.  There is a difference in
 ;  meaning for an empty realm setting between inbound and outbound
 ;  authentication uses.  Look to the CLI config help
-;  "config show help res_pjsip auth realm" or on the wiki for the
-;  difference.
+;  "config show help res_pjsip auth realm" or on https://docs.asterisk.org/
+;  for the difference.
 ;
 ;auth_type=userpass  ; Authentication type.  May be
                      ; "userpass" for plain text passwords or

configs/samples/res_snmp.conf.sample

@@ -9,10 +9,6 @@
 ;
 ; If you use the subagent model, you need to enable agentx in snmpd.conf
 ; Note that you can only run one Asterisk on the system in this case.
-;
-; See https://wiki.asterisk.org/wiki/display/AST/Simple+Network+Management+Protocol+(SNMP)+Support
-; to get more information about
-; snmp support in Asterisk
 
 [general]
 ; We run as a subagent per default -- to run as a full agent