Problem: docs say STABLE API still in DRAFT

Solution: update them

Author: bluca

doc/zmq_getsockopt.txt

@@ -71,8 +71,6 @@ packets received from that interface are processed by the socket. If device
 is a VRF device, then subsequent binds/connects to that socket use addresses
 in the VRF routing table.
 
-NOTE: in DRAFT state, not yet available in stable releases.
-
 [horizontal]
 Option value type:: character string
 Option value unit:: N/A
@@ -259,8 +257,6 @@ a local user name.  A value of 'ZMQ_GSSAPI_NT_KRB5_PRINCIPAL' (2) means it
 is interpreted as an unparsed principal name string (valid only with the
 krb5 GSSAPI mechanism).
 
-NOTE: in DRAFT state, not yet available in stable releases.
-
 [horizontal]
 Option value type:: int
 Option value unit:: 0, 1, 2
@@ -277,8 +273,6 @@ a local user name.  A value of 'ZMQ_GSSAPI_NT_KRB5_PRINCIPAL' (2) means it
 is interpreted as an unparsed principal name string (valid only with the
 krb5 GSSAPI mechanism).
 
-NOTE: in DRAFT state, not yet available in stable releases.
-
 [horizontal]
 Option value type:: int
 Option value unit:: 0, 1, 2

doc/zmq_setsockopt.txt

@@ -79,7 +79,6 @@ is a VRF device, then subsequent binds/connects to that socket use addresses
 in the VRF routing table.
 
 NOTE: requires setting CAP_NET_RAW on the compiled program.
-NOTE: in DRAFT state, not yet available in stable releases.
 
 [horizontal]
 Option value type:: character string
@@ -283,8 +282,6 @@ of 'ZMQ_GSSAPI_NT_USER_NAME' (1) means it is interpreted as a local user name.
 A value of 'ZMQ_GSSAPI_NT_KRB5_PRINCIPAL' (2) means it is interpreted as an
 unparsed principal name string (valid only with the krb5 GSSAPI mechanism).
 
-NOTE: in DRAFT state, not yet available in stable releases.
-
 [horizontal]
 Option value type:: int
 Option value unit:: 0, 1, 2
@@ -300,8 +297,6 @@ Sets the name type of the GSSAPI principal.  A value of
 A value of 'ZMQ_GSSAPI_NT_KRB5_PRINCIPAL' (2) means it is interpreted as an
 unparsed principal name string (valid only with the krb5 GSSAPI mechanism).
 
-NOTE: in DRAFT state, not yet available in stable releases.
-
 [horizontal]
 Option value type:: int
 Option value unit:: 0, 1, 2